To Japanese presentations, publications and media coverages

- E. Kuramochi, N. Matsuda, K. Nozaki, A. H. K. Park, H. Takesue, and M. Notomi, "Wideband slow short-pulse propagation in one-thousand slantingly coupled L3 photonic crystal nanocavities," Opt. Express 26 (8), pp. 9552-9564 (2018).
- T. Ikuta and H. Takesue, "Four-dimensional entanglement distribution over 100 km," Sci. Rep. 8, 817 (2018).
- Y. Takeda, S. Tamate, Y. Yamamoto, H. Takesue, T. Inagaki, and S. Utsunomiya, gBolzmann sampling for an XY model using a non-degenerate optical parametric oscillator network,h Quantum Sci. Technol. 3, 014004 (2018).
- Y. Yamamoto, K. Aihara, T. Leleu, K. Kawarabayashi, S. Kako, M. Fejer, K. Inoue, and H. Takesue, "Coherent Ising machines-optical neural networks operating at the quantum limit," npj Quantum Information 3, 49 (2017) (invited review article).
- N. Matsuda, H. Nishi, P. Karkus, T. Tsuchizawa, K. Yamada, W. J. Munro, K. Shimizu and H. Takesue, "Generation of entangled photons using an arrayed waveguide grating," J. Opt. 19, 124005 (2017).
- H. P. Lo and H. Takesue, "Precise tuning of single-photon frequency using an optical single sideband modulator," Optica 4 (8), 919-923 (2017).
- T. Ikuta and H. Takesue, "Implementation of quantum state tomography for time-bin qudits," New J. Phys. 19 (1), 013039 (2017).
- T. Inagaki, Y. Haribara, K. Igarashi, T. Sonobe, S. Tamate, T. Honjo, A. Marandi, P. L. McMahon, T. Umeki, K. Enbutsu, O. Tadanaga, H. Takenouchi, K. Aihara, K. Kawarabayashi, K. Inoue, S. Utsunomiya, and H. Takesue, "A coherent Ising machine for 2000-node optimization problems," Science Vol. 354, Issue 6312, pp. 603-606 (2016) DOI: 10.1126/science.aah4243.
- P. L. McMahon, A. Marandi, Y. Haribara, R. Hamerly, C. Langrock, S. Tamate, T. Inagaki, H. Takesue, S. Utsunomiya, K. Aihara, R. L. Byer, M. M. Fejer, H. Mabuchi, and Y. Yamamoto, "A fully-programmable 100-spin coherent Ising machine with all-to-all connections," Science Vol. 354, Issue 6312, pp. 614-617 (2016) DOI: 10.1126/science.aah5178.
- H. Takesue and T. Inagaki, "10 GHz clock time-multiplexed degenerate optical parametric oscillators for a photonic Ising spin network," Opt. Lett. 41, 4273-4276 (2016).
- R. Hamerly, K. Inaba, T. Inagaki, H. Takesue, Y. Yamamoto, and H. Mabuchi, "Topological defect formation in 1D and 2D spin chains realized by network of optical parametric oscillators," Int. J. Mod. Phys. B 30, 1630014 (2016).
- N. Matsuda and H. Takesue, "Generation and manipulation of entangled photons on silicon chips," Nanophotonics (2016). doi: 10.1515/nanoph-2015-0148 (invited review paper)
- T. Inagaki, K. Inaba, R. Hamerly, K. Inoue, Y. Yamamoto, and H. Takesue, "Large-scale Ising spin network based on degenerate optical parametric oscillators," Nature Photonics 10, 415-419 (2016). doi:10.1038/nphoton.2016.68
- T. Ikuta and H. Takesue, "Enhanced violation of the Collins-Gisin-Linden-Massar-Popescu inequality with optimized time-bin-entangled ququarts," Phys. Rev. A 93, 022307 (2016).
- H. Takesue, S. D. Dyer, M. J. Stevens, V. Verma, R. P. Mirin, and S. W. Nam, "Quantum teleportation over 100 km of fiber using highly efficient superconducting nanowire single-photon detectors," Optica 2, 832-835 (2015)
- H. Takesue, T. Sasaki, K. Tamaki, and M. Koashi, "Experimental quantum key distribution without monitoring signal disturbance," Nature Photonics 9, 827-831(2015) doi:10.1038/nphoton.2015.173.
- H. Shibata, K. Shimizu, H. Takesue, and Y. Tokura, "Ultimate low system dark-count rate for superconducting nanowire single-photon detector," Opt. Lett. 40, 3428-3431 (2015).
- N. Matsuda, P. Karkus, H. Nishi, T. Tsuchizawa, W. J. Munro, H. Takesue, K. Yamada, "On-chip generation and demultiplexing of quantum correlated photons using a silicon-silica monolithic photonic integration platform," Opt. Express 22, 22831-22840 (2014).
- H. Takesue, "Entangling time-bin qubits with a switch," Phys. Rev. A 89, 062328 (2014).
- N. Matsuda, E. Kuramochi, H. Takesue and M. Notomi, "Dispersion and light transport characteristics of large-scale photonic-crystal coupled nanocavity arrays," Opt. Lett. 39, 2290-2293 (2014).
- H. Takesue, N. Matsuda, E. Kuramochi, and M. Notomi, "Entangled photons from on-chip slow light," Scientific Reports 4, 3913 (2014): doi: 10.1038/srep03913.
- H. Takesue, N. Matsuda, E. Kuramochi, W. J. Munro, and M. Notomi, "An on-chip coupled resonator optical waveguide single-photon buffer," Nature Communications 4, 2725 (2013): doi:10.1038/ncomms3725.
- T. Inagaki, N. Matsuda, O. Tadanaga, M. Asobe, and H. Takesue, "Entanglement distribution over 300 km of fiber," Opt. Express 21, 23241-23249 (2013).
The content of this paper was introduced in
*MIT Technology Review*and*ExtremeTech.* - H. Shibata, K. Shimizu, H. Takesue, and Y. Tokura, "Superconducting nanowire single-photon detector with ultralow dark count rate using cold optical filters," Appl. Phys. Express 6, 072801 (2013).
- N. Matsuda, H. Takesue, K. Shimizu, Y. Tokura, E. Kuramochi, and M. Notomi, "Slow light enhanced correlated photon pair generation in photonic-crystal coupled-resonator optical waveguides," Opt. Express 21, 8596-8604 (2013).
- N. Matsuda, H. Le Jeannic, H. Fukuda, T. Tsuchizawa, W. J. Munro, K. Shimizu, K. Yamada, Y. Tokura, and H. Takesue, "A monolithically integrated polarization entangled photon pair source on a silicon chip," Scientific Reports 2, 817 (2012).
- H. Takesue, "Entangled photon pair generation using silicon wire waveguides," IEEE J. Selected Topics in Quantum Electronics 18, 1722-1732 (2012) (invited paper).
- N. Matsuda, T. Kato, K. Harada, H. Takesue, E. Kuramochi, H. Taniyama, and M. Notomi, "Slow light enhanced optical nonlinearity in a silicon photonic crystal coupled-resonator optical waveguide," Opt. Express 19, 19861-19874 (2011).
- K. Harada, H. Takesue, H. Fukuda, T. Tsuchizawa, T. Watanabe, K. Yamada, Y. Tokura and S. Itabashi, "Indistinguishable photon pair generation using two independent silicon wire waveguides," New J. Phys. 13, 065005 (2011).
- N. Namekata, H. Takesue, T. Honjo, Y. Tokura, and S. Inoue, "High-rate quantum key distribution over 100 km using ultra-low-noise, 2-GHz sinusoidally gated InGaAs/InP avalanche photodiodes," Opt. Express 19, 10632-10639 (2011).
- M. Sasaki, M. Fujiwara, H. Ishizuka, W. Klaus, K. Wakui, M. Takeoka, S. Miki, T. Yamashita, Z. Wang, A. Tanaka, K. Yoshino, Y. Nambu, S. Takahashi, A. Tajima, A. Tomita, T. Domeki, T. Hasegawa, Y. Sakai, H. Kobayashi, T. Asai, K. Shimizu, T. Tokura, T. Tsurumaru, M. Matsui, T. Honjo, K. Tamaki, H. Takesue, Y. Tokura, J. F. Dynes, A. R. Dixon, A. W. Sharpe, Z. L. Yuan, A. J. Shields, S. Uchikoga, M. Legre, S. Robyr, P. Trinkler, L. Monat, J.-B. Page, G. Ribordy, A. Poppe, A. Allacher, O. Maurhart, T. Langer, M. Peev, and A. Zeilinger, "Field test of quantum key distribution in the Tokyo QKD Network," Opt. Express 19, 10387-10409 (2011).
- H. Shibata, H. Takesue, T. Honjo, T. Akazaki, and Y. Tokura, "Single-photon detection using magnesium diboride superconducting nanowires," Appl. Phys. Lett. 97, 212504 (2010).
- T. Seki, H. Shibata, H. Takesue, Y. Tokura, and N. Imoto, "Comparison of timing jitter between NbN superconducting single-photon detector and avalanche photodiode," Physica C 470, 1534-1537 (2010).
- H. Takesue, "Single-photon frequency down-conversion experiment," Phys. Rev. A 82, 013833 (2010).
- H. Takesue, K. Harada, K. Tamaki, H. Fukuda, T. Tsuchizawa, T. Watanabe, K. Yamada, and S. Itabashi, "Long-distance entanglement-based quantum key distribution experiment using practical detectors," Opt. Express 18, 16777-16787 (2010).
- Q. Zhang, H. Takesue, C. Langrock, Xiuping Xie, M. M. Fejer, and Y. Yamamoto, "Hong-Ou-Mandel dip using degenerate photon pairs from a single periodically poled lithium niobate waveguide with integrated mode demultiplexer," Jpn. J. Appl. Phys. 49 064401 (2010).
- H. Takesue, T. Honjo, K. Harada, and B. Miquel, "Quantum communication experiments using telecom-band entangled photons," IEICE Trans. Fundamentals E93-A, 903-909 (2010) (invited paper).
- M. Hunault, H. Takesue, O. Tadanaga, Y. Nishida, and M. Asobe, "Generation of time-bin entangled photon pairs by cascaded second-order nonlinearity in a single periodically poled LiNbO3 waveguide," Opt. Lett. 35, 1239-1241 (2010).
- H. Takesue, H. Fukuda, T. Tsuchizawa, T. Watanabe, K. Yamada, Y. Tokura, and S. Itabashi, "Entanglement generation using silicon wire waveguide," Optics and Spectroscopy 108, 160-164 (2010).
- H. Takesue, K. Harada, H. Fukuda, T. Tsuchizawa, T. Watanabe, K. Yamada, Y. Tokura, and S. Itabashi, "Entanglement generation using silicon photonic wire waveguide," J. Nanosci. Nanotechnol. 10, 1814-1818 (2010) (invited paper).
- K. Harada, H. Takesue, H. Fukuda, T. Tsuchizawa, T. Watanabe, K. Yamada, Y. Tokura, and S. Itabashi, "Frequency and polarization characteristics of correlated photon-pair generation using a silicon wire waveguide," IEEE J. Selected Topics in Quantum Electronics 16, 325-331 (2010).
- H. Takesue and K. Shimizu, "Effects of multiple pairs on visibility measurements of entangled photons generated by spontaneous parametric processes," Opt. Commun. 283, 276-287 (2010).
- H. Shibata, M. Asahi, T. Maruyama, T. Akazaki, H. Takesue, T. Honjo, and Y. Tokura, "Optical response and fabrication of MgB2 nanowire," IEEE Transactions on applied superconductivity 19, 358-360 (2009).
- J. F. Dynes, H. Takesue, Z. L. Yuan, A. W. Sharpe, K. Harada, T. Honjo, H. Kamada, O. Tadanaga, Y. Nishida, M. Asobe, and A. J. Shields, "Efficient entanglement distribution over 200 kilometers," Opt. Express 17, 11440-11449 (2009).
- H. Takesue and Y. Noguchi, "Implementation of quantum state tomography for time-bin entangled photon pairs," Opt. Express 17, 10976-10989 (2009).
- H. Takesue and B. Miquel, "Entanglement swapping using telecom-band photons generated in fibers," Opt. Express 17, 10748-10756 (2009).
- H. Takesue, T. Honjo, K. Tamaki, and Y. Tokura, "Differential phase shift quantum key distribution," IEEE Communications Magazine 47, 102 (2009) (invited paper).
- Q. Zhang, H. Takesue, T. Honjo, K. Wen, T. Hirohata, M. Suyama, Y. Takiguchi, H. Kamada, Y. Tokura, O. Tadanaga, Y. Nishida, M. Asobe and Y. Yamamoto, "Megabits secure key rate quantum key distribution," New J. Phys. 11, 045010 (2009). This paper was chosen as "IOP Select".
- B. Miquel and H. Takesue, "Observation of 1.5 ƒÊm band entanglement using single photon detectors based on sinusoidally gated InGaAs/InP avalanche photodiodes," New J. Phys. 11, 045006 (2009).
- K. Harada, H. Takesue, H. Fukuda, T. Tsuchizawa, T. Watanabe, K. Yamada, Y. Tokura, and S. Itabashi, "Generation of high-purity entangled photon pairs using silicon wire waveguide," Opt. Express 16, 20368-20373 (2008).
- T. Honjo, S. W. Nam, H. Takesue, Q. Zhang, H. Kamada, Y. Nishida, O. Tadanaga, M. Asobe, B. Baek, R Hadfield, S. Miki, M. Fujiwara, M. Sasaki, Z. Wang, K. Inoue, and Y. Yamamoto, "Long-distance entanglement-based quantum key distribution over optical fiber," Opt. Express 16, 19118-19126 (2008).
- H. Takesue, "Erasing distinguishability using quantum frequency up-conversion," Phys. Rev. Lett. 101, 173901 (2008).
- K. Inoue, T. Ohashi, T. Kukita, K. Watanabe, S. Hayashi, T. Honjo, and H. Takesue, "Differential-phase-shift quantum secret sharing," Opt. Express 16, 15469-15476 (2008).
- H. Shibata, T. Maruyama, T. Akazaki, H. Takesue, T. Honjo, and Y. Tokura, "Photon detection and fabrication of MgB2 nanowire," Physica C 468, 1992 (2008).
- Q. Zhang, H. Takesue, S. W. Nam, C. Langrock, X. Xie, B. Baek, M. M. Fejer, and Y. Yamamoto, "Distribution of time-energy entanglement over 100 km fiber using superconducting singlephoton detectors," Opt. Express 16, 5776-5781 (2008).
- H. Takesue, H. Fukuda, T. Tsuchizawa, T. Watanabe, K. Yamada, Y. Tokura, and S. Itabashi, "Generation of polarization entangled photon pairs using silicon wire waveguide," Opt. Express 16, 5721-5727 (2008).
- H. Kamada, M. Asobe, T. Honjo, H. Takesue, Y. Tokura, Y. Nishida, O. Tadanaga, and H. Miyazawa, "Efficient and low-noise single-photon detection in 1550 nm communication band by frequency upconversion in periodically poled LiNbO3 waveguides," Opt. Lett. 33, 639-641 (2008).
- Q. Zhang, C. Langrock, H. Takesue, X. Xie, M. M. Fejer, and Y. Yamamoto, "Generation of 10-GHz clock sequential time-bin entanglement," Opt. Express 16, 3293-3298 (2008).
- H. Takesue, Y. Tokura, H. Fukuda, T. Tsuchizawa, T. Watanabe, K. Yamada, and S. Itabashi, "Entanglement generation using silicon wire waveguide," Appl. Phys. Lett. 91, 201108 (2007).
- T. Honjo, H. Takesue, H. Kamada, Y. Nishida, O. Tadanaga, M. Asobe, and K. Inoue, "Long-distance distribution of time-bin entangled photon pairs over 100 km using frequency up-conversion detectors," Opt. Express 15, 13957-13964 (2007).
- Q. Zhang, X. Xie, H. Takesue, S. W. Nam, C. Langrock, M. M. Fejer, and Y. Yamamoto, "Correlated photon-pair generation in reverse-proton-exchange PPLN waveguides with integrated mode demultiplexer at 10 GHz clock," Opt. Express 15, 10288-10293 (2007).
- N. Namekata, G. Fujii, S. Inoue, T. Honjo and H. Takesue, "Differential phase shift quantum key distribution using single-photon detectors based on a sinusoidally gated InGaAs/InP avalanche photodiode," Appl. Phys. Lett. 91, 011112 (2007).
- H. Takesue, S. W. Nam, Q. Zhang, R. H. Hadfield, T. Honjo, K. Tamaki and Y. Yamamoto, "Quantum key distribution over 40 dB channel loss using superconducting single-photon detectors," Nature Photonics 1, 343 (2007).
- H. Takesue, "1.5-um band Hong-Ou-Mandel experiment using photon pairs generated in two independent dispersion shifted fibers," Appl. Phys. Lett. 90, 204101 (2007).
- T. Honjo, H. Takesue and K. Inoue, "Differential-phase quantum key distribution experiment using a series of quantum entangled photon pairs," Opt. Lett. 32, 1165-1167 (2007).
- T. Honjo, H. Takesue and K. Inoue, "Generation of energy-time entangled photon pairs in 1.5-um band with periodically poled lithium niobate waveguide," Opt. Express 15, 1679-1683 (2007).
- E. Diamanti, H. Takesue, C. Langrock, M. M. Fejer and Y. Yamamoto, "100 km differential phase shift quantum key distribution experiment with low
jitter up-conversion detectors," Opt. Express 14, 13073-13082 (2006). The content of this paper was introduced in
*New Scientist.* - H. Takesue, E. Diamanti, C. Langrock, M. M. Fejer and Y. Yamamoto, "1.5-um single photon counting using polarization-independent up-conversion detector," Opt. Express 14, 13067-13072 (2006).
- H. Takesue, E. Diamanti, C. Langrock, M. M. Fejer and Y. Yamamoto, "10-GHz clock differential phase shift quantum key distribution experiment,"
Opt. Express 14, 9522-9530 (2006). The content of this paper was introduced in
*Nature Photonics.* - H. Takesue and K. Inoue, "Quantum secret sharing based on modulated high-dimensional time-bin entanglement," Phys. Rev. A 74, 012315 (2006).
- H. Takesue, T. Honjo, and H. Kamada, "Differential phase shift quantum key distribution using 1.3-um up-conversion detectors," Jpn. J. Appl. Phys. 45, 5757 (2006).
- H. Takesue, N. Yoshimoto, Y. Shibata, T. Ito, Y. Tohmori and T. Sugie, "Wavelength channel data rewriter using semiconductor optical saturator / modulator," J. Lightwave Technol. 24, 2347 (2006).
- H. Takesue, "Long-distance distribution of time-bin entanglement generated in a cooled fiber," Opt. Express 14, 3453-3460 (2006).
- K. Inoue and H. Takesue, "Quantum key distribution using entangled-photon trains with no basis selection," Phys. Rev. A 73, 032332 (2006).
- E. Diamanti, C. Langrock, M. M. Fejer, Y. Yamamoto and H. Takesue, "1.5-um photon-counting optical time domain reflectometry with a single-photon detector using up-conversion in a PPLN waveguide," Opt. Lett. 31, 727 (2006).
- E. Waks, H. Takesue and Y. Yamamoto, "Security of differential-phase-shift quantum key distribution against individual attacks," Phys. Rev. A 73, 012344 (2006).
- H. Takesue, E. Diamanti, T. Honjo, C. Langrock, M. M. Fejer, K. Inoue and Y. Yamamoto, "Differential phase shift quantum key distribution experiment over 105 km fibre," New J. Phys. 7, 232 (2005).
- E. Diamanti, H. Takesue, T. Honjo, K. Inoue, and Y. Yamamoto, "Performance of various quantum key distribution systems using 1.55 um up-conversion single-photon detectors," Phys. Rev. A. 72, 052311 (2005).
- H. Takesue and K. Inoue, "Generation of 1.5-um band time-bin entanglement using spontaneous fiber four-wave mixing and planar lightwave circuit interferometers," Phys. Rev. A 72, 041804(R) (2005).
- H. Takesue and K. Inoue, "1.5-um band quantum-correlated photon pair generation in dispersion-shifted fiber: suppression of noise photons by cooling fiber," Opt. Express, 13, 7832-7839 (2005).
- Y. Katagiri, H. Takesue, E. Hashimoto, "Wavelength-scanning optical bandpass filters based on optomechatronics for optical frequency sweepers," IEEE Trans. Industrial Electron., 52, 992 (2005).
- C. Langrock, E. Diamanti, R. V. Roussev, Y. Yamamoto, M. M. Fejer, and H. Takesue, "Highly efficient single-photon detection at communication wavelengths by use of upconversion in reverse-proton-exchanged periodically poled LiNbO3 waveguides," Opt. Lett., 30, 1725 (2005).
- H. Takesue, K. Inoue, O. Tadanaga, Y. Nishida, and M. Asobe, "Generation of pulsed polarization-entangled photon pairs in a 1.55-um band with a periodically poled lithium niobate waveguide and an orthogonal polarization delay circuit," Opt. Lett., 30, 293 (2005).
- H. Takesue and K. Inoue, "Generation of polarization entangled photon pairs and violation of Bell's inequality using spontaneous four-wave mixing in a fiber loop," Phys. Rev. A 70, 031802(R) (2004).
- H. Takesue and T. Horiguchi, "Broadband lightwave synthesized frequency sweeper using synchronous filtering," IEEE J. Lightwave Technol., Vol. 22, No. 3, pp. 755-762, 2004.
- H. Takesue and T. Sugie, "Wavelength channel data rewrite using saturated SOA modulator for WDM networks with centralized light sources," IEEE J. Lightwave Technol., Vol. 21, No. 11, pp. 2546-2556, 2003.
- H. Takesue, T. Horiguchi and T. Kobayashi, "Numerical simulation of a lightwave synthesized frequency sweeper incorporating an optical SSB modulator composed of four optical phase modulators," IEEE J. Lightwave Technol., Vol. 20, No. 11, pp. 1908-1917, 2002.
- T. Sato, F. Yamamoto, K. Tsuji, H. Takesue, and T. Horiguchi, "An uncooled external cavity diode laser for coarse-WDM access network systems," IEEE Photon. Technol. Lett., Vol. 14, No. 7, pp. 1001-1003, 2002.
- H. Takesue and T. Horiguchi, "Chromatic dispersion measurement of optical components using lightwave synthesized frequency sweeper," IEEE J. Lightwave Technol., Vol. 20, No. 4, pp. 625-633, 2002.
- H. Takesue, F. Yamamoto and T. Sugie, "Novel node configuration for DWDM photonic access ring using CMLS," IEEE Photon. Technol. Lett., Vol. 12, No. 12, pp. 1698-1700, 2000.
- H. Takesue, F. Yamamoto and T. Horiguchi, "Fast and accurate measurement of WDM components using lightwave synthesised frequency sweeper," Electron. Lett., Vol. 36, No. 12, pp. 1047-1048, 2000.
- H. Takesue, F. Yamamoto, and T. Horiguchi, "Stable lightwave synthesized frequency sweeper using Fabry-Perot cavity composed of Faraday rotator mirrors," IEEE J. Lightwave Technol., Vol. 18, No. 3, pp. 375-383, 2000.
- H. Takesue, F. Yamamoto, and T. Horiguchi, "Stable lightwave frequency synthesis over 1-THz span using Fabry-Perot cavity containing polarization-rotation elements and actively controlled tunable bandpass filter," IEEE Photon. Technol. Lett. Vol. 12, No. 1, pp. 79-81, 2000.
- H. Takesue, F. Yamamoto, K. Shimizu and T. Horiguchi, "Stable lightwave frequency synthesiser using discrete-time negative frequency feedback with polarisation diversity technique," Electron. Lett., Vol. 35, No. 7, pp. 594-595, 1999.
- H. Takesue, F. Yamamoto, K. Shimizu and T. Horiguchi, "Stabilization of pulsed lightwave circulating around an amplified fiber-optic ring incorporating a Lyot depolarizer," IEEE Photon. Technol. Lett., Vol. 10, No. 12, pp. 1748-1750, 1998.
- H. Takesue, F. Yamamoto, K. Shimizu and T. Horiguchi, "1 THz lightwave synthesised frequency sweeper with synchronously tuned bandpass filter," Electron. Lett., Vol. 34, No. 15, pp. 1507-1508, 1998.

- H. Takesue and T. Ikuta, "Long-distance quantum teleportation and high-dimensional entanglement distribution over optical fiber," IEEE Summer Topicals 2018, WD2.2, July 11, 2018, Waikoloa, Hawaii (invited).
- H. Takesue, "Integrated quantum photonics and coherent Ising machine," Advances in Quantum Engineering International Meeting 2018, June 25, 2018, Singapore (invited).
- R. Hamerly, T. Inagaki, P. L. McMahon, D. Venturelli, A. Marandi, T. Onodera, E. Ng, E. Rieffel, M. M. Fejer, S. Utsunomiya, H. Takesue, and Y. Yamamoto, "Quantum vs. optical annealing: benchmarking the OPO Ising machine and D-Wave," CLEO:2018, FTu4A.2, May 15, 2018, San Jose.
- T. Honjo, T. Inagaki, K. Inaba, and H. Takesue, "Long-term stable operation of coherent Ising machine for cloud service," CLEO:2018, JTu2A.87, May 15, 2018, San Jose.
- H. Takesue, "Degenerate optical parametric oscillators for solving Ising model," International Conference on Nano-photonics and Nano-optoelectronics (ICNN 2018), ICNN3-1, Optics and Photonics International Congress (OPIC) 2018, April 26, 2018, Yokohama (invited).
- H. Takesue, T. Inagaki, K. Inaba, T. Ikuta, and T. Honjo, "A coherent Ising machine for solving combinatorial optimization problems," The 3rd Laser Solutions for Space and the Earth (LSSE 2018), LSSE1-1, Optics and Photonics International Congress (OPIC) 2018, April 24, 2018, Yokohama (invited).
- P. McMahon, A. Marandi, R. Hamerly, E. Ng, T. Onodera, Y. Haribara, C. Langrock, D. Venturelli, E. Rieffel, S. Tamate, T. Inagaki, H. Takesue, S. Utsunomiya, K. Aihara, R. Byer, M. Fejer, H. Mabuchi, and Y. Yamamoto, "Progress on coherent Ising machines constructed from optical parametric oscillators," APS March Meeting 2018, S28.00013, March 8, 2018, Los Angeles.
- H. Ito, Y. Murata, K. Kuroda, H. Takesue, and M. Hasegawa, "Performance Analysis of a Coherent Ising Machine with Real Machine Constraints," The 6th Korea-Japan Joint Workshop on Complex Communication Sciences, P39, January 10, 2018, Jozankei, Japan.
- H. Takesue, T. Inagaki, K. Inaba, and T. Honjo, "A coherent Ising machine for solving combinatorial optimization problems," 2017 Workshop on Innovative Nanoscale Devices and Systems (WINDS 2017), November 28, 2017, Hawaii (invited).
- H. Takesue, "Coherent Ising machine for solving complex optimization problems," International School and Symposium on Nanoscale Transport and Photonics (ISNTT) 2017, 8th BRL School, Lecture 3, November 13, 2017, Atsugi (invited lecture).
- Y. Takeda, S. Tamate, Y. Yamamoto, H. Takesue, T. Inagaki, S. Utsunomiya, gBolzmann sampling for an XY model using a non-degenerate optical parametric oscillator network,h FM4E.3, September 18, 2017, Washington DC.
- H. Takesue, T. Inagaki, K. Inaba, T. Honjo, T. Ikuta, H. Uchiyama, K. Enbutsu, T. Umeki, R. Kasahara, "Solving intractable problems with coherent Ising machine," JSAP-OSA Joint Symposia 2017, 7p-A410-3, September 7, 2017, Fukuoka (invited).
- H. P. Lo and H. Takesue, "Erasing frequency distinguishability of single photons using optical single sideband modulator," CLEO Pacific Rim 2017, Oral 2-4O-3, August 2, 2017, Singapore.
- H. Takesue, T. Inagaki, K. Inaba, and T. Honjo, "Solving large-scale optimization problems with coherent Ising machine," CLEO Pacific Rim 2017, Oral 2-4O-1, August 2, 2017, Singapore (invited).
- H. Takesue, T. Ikuta, H. P. Lo, and N. Matsuda, "Integrated photonic circuits for time-bin encoded quantum information systems," The 8th International Conference on Metamaterials, Photonics Crystals and Plasmonics (META'17), July 28, 2017, Incheon, South Korea (invited).
- P. L. McMahon, A. Marandi, Y. Haribara, R. Hamerly, C. Langrock, S. Tamate, T. Inagaki, H. Takesue, S. Utsunomiya, K. Aihara, R. L. Byer, M. M. Fejer, H. Mabuchi, and Y. Yamamoto, "Combinatorial optimization using networks of optical parametric oscillators," Nonlinear Optics (NLO) 2017, MN2B.2, July 17, 2017,Waikoloa, Hawaii.
- N. Matsuda, E. Kuramochi, H. Takesue, K. Shimizu, M. Notomi, "Resonant Photon Pair Generation from Coupled Silicon Photonic Crystal Nanocavities," CLEO/Europe-EQEC 2017, CK-8.4, June 27, 2017, Munich
- H. Takesue, "Artificial spin network based on coupled optical parametric oscillators for solving Ising model," Spintech IX, INV6, June 7, 2017, Fukuoka, Japan (invited).
- T. Ikuta and H. Takesue, "Distribution of four-dimensional time-bin entangled state over 100 km of fiber," CLEO:2017, FTh4E.7, May 18, 2017, San Jose.
- H. Takesue, "Information processing with quantum optics," Workshop on Advancing Communication and Quantum Information Research in Engineering (ACQUIRE), May 6, 2017, San Jose (invited).
- T. Inagaki, Y. Haribara, K. Igarashi, T. Sonobe, S. Tamate, T. Honjo, A. Marandi, P. L. McMahon, T. Umeki, K. Enbutsu, O. Tadanaga, H. Takenouchi, K. Aihara, K. Kawarabayashi, K. Inoue, S. Utsunomiya, H. Takesue, "A coherent Ising machine based on networked optical parametric oscillators for optimization problems," Information Photonics, IP-19PM-1-1, April 19, 2017, Yokohama (invited).
- H. Takesue, "Solving combinatorial optimization problems with coherent Ising machine," The first annual symposium on Quantum Science and Quantum Engineering, April 6, 2017, Wurzburg, Germany (invited).
- H. Takesue, T. Inagaki, K. Inaba, R. Hamerly, K. Inoue, and Y. Yamamoto, "Large-scale artificial spin network based on time-multiplexed degenerate optical parametric oscillators for coherent Ising machine," SPIE Photonics West 2017, 10088-36, February 1, 2017, San Francisco (invited).
- N. Matsuda, H. Nishi, P. Karkus, T. Tsuchizawa, K. Yamada, W. J. Munro, K. Shimizu, H. Takesue, "Generation of path-entangled photons using an arrayed waveguide grating," Frontiers in Optics/Laser Science (FiO/LS) 2016, FW3F.6, Octorber 19, 2016, Rochester, NY.
- H. Takesue, "Emerging quantum information technologies -quantum for sustaining the Moore's law-," Solid State Devices and Materials (SSDM) 2016, Rump Session B, September 28, 2016, Tsukuba (invited panelist).
- H. Takesue, T. Sasaki, K. Tamaki, and M. Koashi, "Round-robin differential phase shift quantum key distribution experiment," Trustworthy Quantum Information 2016, June 28, 2016, Shanghai, China (invited).
- H. Takesue and T. Inagaki, "10-GHz clock time-multiplexed degenerate optical parametric oscillators for coherent Ising machine," CLEO:2016, STh3F.4, June 9, 2016, San Jose.
- H. Takesue, "Towards large scale coherent Ising machine," US-Japan Workshop; New-Generation Computers: Quantum Annealing and Coherent Computing, December 10, 2015, Stanford (invited).
- T. Ikuta and H. Takesue, "Violation of the CGLMP inequality with entangled time-bin ququarts," 5th International Conference on Quantum Cryptography (QCrypt 2015), poster 109, September 29, 2015, Tokyo.
- T. Inagaki, K. Inoue, Y. Yamamoto, and H. Takesue, "Simulating one-dimensional Ising spins with optically-coupled timedivision-multiplexed optical parametric oscillators," Nonlinear Optics (NLO) 2015, NTu1B.6, July 28, 2015, Kauai, Hawaii.
- H. Takesue, T. Inagaki, K. Inoue, and Y. Yamamoto, "Time-division-multiplexed degenerate optical parametric oscillator for a coherent Ising machine," IEEE Summer Topicals 2015, TuF4.2, July 14, 2015, Nassau, Bahamas (invited).
- S. D. Dyer, H. Takesue, M. J. Stevens, V. Verma, R. Horansky, R. P. Mirin, and S. W. Nam, "High-performance superconducting nanowire single-photon detectors: metrology and application to quantum teleportation," Single Photon Workshop 2015, Poster 7, July 14, 2015, Geneva, Switzerland.
- E. Kuramochi, N. Matsuda, K. Nozaki, H. Takesue, and M. Notomi, "Over-1mm-long wideband on-chip slowlight waveguides realized by 1,000 coupled L3 nanocavities," CLEO:2015, SF2H.1, May 15, 2015, San Jose.
- S. D. Dyer, H. Takesue, V. Verma, R. Horansky, R. P. Mirin, and S. W. Nam, "Polarization-insensitive superconducting nanowire single-photon detectors," CLEO:2015, FF2A.4, May 15, 2015, San Jose.
- H. Takesue, S. D. Dyer, M. J. Stevens, V. Verma, R. P. Mirin, and S. W. Nam, "Quantum teleportation over 100 km of fiber using MoSi superconducting nanowire single-photon detectors," CLEO:2015, FF1A.4, May 15, 2015, San Jose.
- H. Takesue, "Quantum photonics and communication using silicon devices," Topical Workshop on Nonlinear Quantum Photonics, February 25, 2015, Sydney (invited).
- T. Inagaki, T. Imai, J. Miyazu, H. Takesue and J. Kobayashi, gLow-voltage optical phase modulation by electric-field-induced phase transition of KTN Bulk crystal,h IEEE Photonics Conference (IPC) 2014, WB2.2, Oct. 15, 2014, La Jolla, CA.
- N. Matsuda, P. Karkus, H. Nishi, T. Tsuchizawa, W. Munro, H. Takesue, K. Yamada, "On-chip generation and demultiplexing of quantum correlated photons using silicon-silica monolithic waveguide platform," ECOC 2014, Tu.4.7.4, Sep. 23, 2014, Cannes, France.
- H. Takesue, "A time-bin qubit entangler based on photon switching," CLEO:2014, FTh1A, June 12, 2014, San Jose.
- E. Kuramochi, A. Park, N. Matsuda, H. Takesue, M. Notomi, "Large-scale slanted arrays of high-Q coupled Si L3 nanocavities," PECS-XI, O-15, May 13, 2014, Shanghai, China.
- H. Shibata, K. Shimizu, T. Honjo, H. Takesue, Y. Tokura, "Fabrication of ultralow noise SSPD and long distance QKD experiment," International Symposium on Nanoscale Transport and Technology 2013, PTu4, November 26, 2013, Atsugi.
- H. Takesue, N. Matsuda, E. Kuramochi, M. Notomi, "Entangled photon pair generation using on-chip slow light," Single Photon Workshop 2013, October 17, 2013, Oak Ridge.
- H. Shibata, K. Shimizu, H. Takesue, Y. Tokura, "Superconducting nanowire single-photon detector with ultra-low dark count rate," International Superconductive Electronics Conference 2013, July 7, 2013, Boston.
- N. Matsuda, H. Le Jeannic, H. Fukuda, T. Tsuchizawa, W. J. Munro, K. Shimizu, K. Yamada, and H. Takesue, "Monolithic source of telecom-band polarization entanglement on a silicon photonic chip," CLEO-PR & OECC/PS 2013, ThM1-1, July 4, 2013, Kyoto (invited).
- T. Inagaki, N. Matsuda, O. Tadanaga, Y. Nishida, M. Asobe, and H. Takesue, "Long distance distribution of entangled photon pair over 300 km of fiber," CLEO:2013, QTu2C.2, June 11, 2013, San Jose.
- H. Takesue, N. Matsuda, E. Kuramochi, M. Notomi, "Integrated single photon buffer based on coupled-resonator optical waveguide," CLEO:2013, QTu1C.5, June 11, 2013, San Jose.
- N. Matsuda, H. Takesue, K. Shimizu, Y. Tokura, E. Kuramochi, M. Notomi, "Slow-light-enhanced correlated photon pair generation in a silicon photonic crystal coupled-resonator optical waveguide," CLEO/Europe-IQEC 2013 IA-6.4, May 15, 2013, Munich, Germany.
- N. Matsuda, E. Kuramochi, H. Takesue, K. Shimizu, Y. Tokura, M. Notomi, "Ultra-narrowband nonlinear wavelength conversion using coupled photonic crystal nanocavities," CLEO/Europe-IQEC 2013,CK-1.5, May 12, 2013, Munich, Germany (invited).
- N. Matsuda, H. Le Jeannic, H. Fukuda, T. Tsuchizawa, K. Yamada, Y. Tokura, and H. Takesue "Polarization-entangled photon pair source on a chip," 2012 IEEE 9th International Conference on Group IV Photonics (GFP), ThP9, Aug 30, 2012, San Diego, CA.
- H. Le Jeannic, N. Matsuda, H. Takesue, H. Fukuda, T. Tsuchizawa, T. Watanabe, K. Yamada, S. Itabashi, and Y. Tokura, "Monolithically-integrated polarization-entangled photon pair source on a silicon-on-insulator photonic circuit," CLEO:2012, QF2F.2, San Jose, California.
- H. Takesue, "Quantum communication experiments using superconducting single-photon detectors," International Workshop on Nanowire Superconducting Single-Photon Detectors (NSSPD), September 23, 2011, Eindhoven, Netherlands (invited).
- N. Matsuda, T. Kato, K. Harada, H. Takesue, E. Kuramochi, M. Notomi, "Slow light enhanced waveguide nonlinearity in ultrahigh-Q photonic crystal coupled resonator chain," Microopics Conference (MOC) 2011, October 31, 2011, Sendai.
- H. Takesue, "Entanglement generation using silicon wire waveguide," IEEE Summer Topicals 2011, MA3.3, July 18, 2011, Montreal, Canada (invited).
- N. Matsuda, T. Kato, K. Harada, H. Takesue, E. Kuramochi, and M. Notomi, "Highly-efficient four-wave mixing in a couplednanocavity waveguide," CLEO/QELS 2011, CFI3, May 6, 2011, Baltimore.
- N. Namekata, H. Takesue, T. Honjo, Y. Tokura, and S. Inoue, "Practical Quantum Key Distribution Over 100 km Using Sinusoidally Gated InGaAs/InP Avalanche Photodiodes," CLEO/QELS 2011, JTuC3, May 3, 2011, Baltimore.
- H. Takesue, "Single-photon frequency downconversion experiment," Photonics Global Conference 2010, 3-4A-2, December 16, Singapore (invited).
- H. Takesue, "Quantum frequency downconversion experiment", Inernational conference on quantum communication, measurement and computing, QCMC 2010, P3-1, July 22, 2010, Brisbane, Australia.
- M. Hunault, H. Takesue, O. Tadanaga, Y. Nishida, and M. Asobe, "Generation of time-bin entangled photon pairs using cascaded second-order nonlinearity in single periodically-poled lithium niobate waveguide," CLEO/QELS 2010, QThG4, May20, 2010, San Jose.
- K. Inoue, H. Takesue and A. Yoshizawa, ``Quantum entangled photons and quantum key distribution," 2010 International Symposium on Physics of Quantum Technology, Talk No.26, April 9, 2010, Tokyo.
- J. F. Dynes, H. Takesue, Z. L. Yuan, A. W. Sharpe, K. Harada, T. Honjo, H. Kamada, O. Tadanaga, Y. Nishida, M. Asobe, and A. J. Shields, "Entanglement distribution over 200 km," 2010 International Symposium on Physics of Quantum Technology, 8TH-54, April 8, 2010, Tokyo.
- H. Takesue, "Erasing frequency distinguishability using quantum frequency up-conversion," 2010 International Symposium on Physics of Quantum Technology, 8TH-8, April 8, 2010, Tokyo.
- H. Takesue, "Quantum communication experiments using telecom-band entangled photons", International Conference on Quantum Information and Technology (ICQIT) 2009, December 3, 2009, Tokyo (invited).
- J. F. Dynes, H. Takesue, Z. L. Yuan, A. W. Sharpe, K. Harada, T. Honjo, H. Kamada, O. Tadanaga, Y. Nishida, M. Asobe, and A. J. Shields, "Efficient entanglement distribution over 200 kilometers fiber using self-differencing InGaAs avalanche photodiodes," Frontiers in optics 2009, JWE2, October 14, 2009, San Jose.
- K. Yamada, T. Tsuchizawa, T. Watanabe, H. Fukuda, H. Shinojima, H. Nishi, K. Harada, H. Takesue Y. Tokura, and S. Itabashi, "Nonlinear functions and quantum entanglement generation using silicon photonic wire waveguides," ECOC 2009, session 7.2, September 23, 2009, Vienna (invited).
- H. Takesue, K. Harada, K. Tamaki, H. Fukuda, T. Tsuchizawa, T. Watanabe, K. Yamada, and S. Itabashi, "Unconditionally secure entanglement-based quantum key distribution experiment," Conference on Quantum Information & Quantum Control (CQIQC) III, Session 10, August 27, 2009, Toronto, Canada.
- J. F. Dynes, H. Takesue, Z. L. Yuan, A. W. Sharpe, K. Harada, T. Honjo, H. Kamada, O. Tadanaga, Y. Nishida, M. Asobe, and A. J. Shields, "Ulta-long distance and efficient entanglement distribution over 200 kilometers," CLEO/IQES 2009, postdeadline paper IPDA7, June 4, 2009, Baltimore.
- H. Takesue, "Erasing frequency distinguishability using single-photon up-conversion," CLEO/IQEC 2009, IThJ7, June 4, 2009, Baltimore.
- K. Shimizu, H. Takesue and K. Tamaki, "Two-photon interference for quantum cryptography with a non-maximally entangled photon pair," CLEO/IQEC 2009, IWC6, June 3, 2009, Baltimore.
- Q. Zhang, H. Takesue, T. Honjo, K. Wen, T. Hirohata, M. Suyama, Y. Takiguchi, H. Kamada, Y. Tokura, O. Tadanaga, Y. Nishida, M. Asobe and Y. Yamamoto, "Megabits secure key rate quantum key distribution," CLEO/IQEC 2009, ITul1, June 2, 2009, Baltimore.
- H. Takesue, K. Harada, H. Fukuda, T. Tsuchizawa, T. Watanabe, K. Yamada, Y. Tokura, and S. Itabashi, "Silicon photonics in quantum communications," CLEO/IQEC 2009, CMAA1, June 1, 2009, Baltimore (invited).
- H. Takesue, "Telecom-band entanglement swapping using high-speed single photon detectors based on sinusoidally gated InGaAs/InP avalanche photodiodes," SPIE Defence, Security + Sensing 2009, Advanced Photon Counting Techniques III, 7320-29 (invited).
- K. Inoue, H. Takesue and T. Honjo, "DPS quantum key distribution and related technologies" , SPIE Photonic West, 7236-16, 2009.
- K. Harada, H. Takesue, H. Fukuda, T. Tsuchizawa, T. Watanabe, K. Yamada, Y. Tokura, and S. Itabashi, "Frequency and polarization characteristics of correlated photon-pair generation in silicon wire waveguide," International Symposium on Nanoscale Transport and Technology 2009, ISNTT 2009, PWe-10, January 21, 2009, Atsugi, Japan.
- Q. Zhang, H. Takesue, T. Honjo, K. Wen, T. Hirohata, M. Suyama, Y. Takiguchi, H. Kamada, Y. Tokura, O. Tadanaga, Y. Nishida, M. Asobe, S. W. Nam, R. H. Hadfield, K. Tamaki, K. Inoue, Y. Yamamoto, "Experimental research status of differential phase shifted quantum key distribution," International Symposium on Physics of Quantum Technology 2008, TH-E6, November 27, 2008, Nara.
- K. Harada, H. Takesue, H. Fukuda, T. Tsuchizawa, T. Watanabe, K. Yamada, Y. Tokura, and S. Itabashi, "High-purity entanglement generation using silicon wire waveguide," International Symposium on Physics of Quantum Technology 2008, TH-E3, November 27, 2008, Nara.
- T. Honjo, S. W. Nam, H. Takesue, Q. Zhang, H. Kamada, Y. Nishida, O. Tadanaga, M. Asobe, B. Baek, R Hadfield, S. Miki, M. Fujiwara, M. Sasaki, Z. Wang, K. Inoue, and Y. Yamamoto, "Long-distance entanglement-based quantum key distribution over optical fiber," International Symposium on Physics of Quantum Technology 2008, TH-E2, November 27, 2008, Nara.
- H. Takesue and B. Miquel, "Swapping telecom-band entanglement generatedin fibers, International Symposium on Physics of Quantum Technology 2008, TH-E1, November 27, 2008, Nara.
- H. Takesue and T. Honjo, "Quantum communication experiments using telecom-band entangled photons," LEOS Annual Meeting 2008, ThG4, November 13, 2008, Newport Beach, California (invited).
- T. Honjo, H. Takesue, H. Kamada, K. Tamaki, H. Shibata, K. Shimizu, Y. Tokura,S. Yamamoto, T. Yamamoto, Y. Nishida, O. Tadanaga, M. Asobe, and K. Inoue, "Field trial of differential-phase-shift QKD using polarization independent freqeuncy up-conversion detectors," SECOQC, Oct 10, 2008, Vienna, Austria, 2008.
- K. Yamada, T. Tsuchizawa, T. Watanabe, H. Fukuda, H. Shinojima, H. Nishi, H. Takesue, T. Tanabe, A. Shinya, E. Kuramochi, M. Notomi, Y. Tokura, S. Itabashi, "Applications of nonlinear effects in silicon wire waveguides: all-optical modulation, wavelength conversion, and quantum entanglement," SPIE Asia-Pacific Optical Communications, APOC 2008, Paper 7134-64, October 28, 2008, Hangzhou, China (invited).
- H. Takesue, H. Fukuda, T. Tsuchizawa, T. Watanabe, K. Yamada, Y. Tokura, and S. Itabashi, "Entanglement generation using silicon photonic wire waveguide," The 2nd IEEE Nanotechnology Materials and Devices Conference, NMDC 2008, MoC II-3, October 20, 2008, Kyoto (invited).
- H. Takesue, K. Harada, H. Fukuda, T. Tsuchizawa, T. Watanabe, K. Yamada, Y. Tokura, and S. Itabashi, "Entanglement generation using silicon wire waveguide," XII International Conference on Quantum Optics and Quantum Information, ICQO 2008, September 22, 2008, Vilnius, Lithuania (invited).
- H. Takesue, H. Fukuda, T. Tsuchizawa, T. Watanabe, K. Yamada, Y. Tokura, and S. Itabashi, "Entanglement generation using silicon wire waveguide," 5th International Conference on Group IV Photonics, GFP 2008, FD1, September 19, 2008, Sorrento, Italy (invited).
- K. Harada, H. Takesue, H. Fukuda, T. Tsuchizawa, T. Watanabe, K. Yamada, Y. Tokura, and S. Itabashi, "High-purity entanglement generation using silicon wire waveguide," 8th Asian Conference on Quantum Information Science, AQIS 2008, August 30, 2008, Seoul.
- H. Takesue, "Swapping telecom-band entanglement generated in fibers," 8th Asian Conference on Quantum Information Science, AQIS 2008, August 30, 2008, Seoul.
- H. Shibata, M. Asahi, T. Maruyama, T. Akazaki, H. Takesue, T. Honjo, Y. Tokura, "Optical Response and Fabrication of MgB2 Nanowire Detectors," 2008 Applied Superconductivity Conference, ASC 2008, 3EPD02, August 20, 2008, Chicago.
- B. Baek, S. W. Nam, D. Rosenberg, J.E. Nordholt, H. Takesue, Y. Yamamoto, M. Sasaki, A. Tomita, "Application of superconducting single photon detector technology to practical quantum key distribution systems," 2008 Applied Superconductivity Conference, ASC 2008, 2EY06, August 19, 2008, Chicago.
- T. Honjo, S. W. Nam, H. Takesue, Q. Zhang, H. Kamada, Y. Nishida, O. Tadanaga, M. Asobe, B. Baek, R. Hadfield, S. Miki, M. Fujiwara, M. Sasaki, Z. Wang, K. Inoue and Y. Yamamoto, "Entanglement-based BBM92 QKD experiment using superconducting single photon detectors," LPHYS'08, 7.10.4, Trondheim, Norway, 2008 (Invited).
- H. Takesue, T. Honjo, K. Tamaki, and Y. Tokura, "Differential phase shift quantum key distribution," ITU-T Kaleidoscope Academic Conference: Innovations in NGN - Future Network and Services, S8.2, May 13, 2008, Geneva.
- H. Takesue, H. Fukuda, T. Tsuchizawa, T. Watanabe, K. Yamada, Y. Tokura, and S. Itabashi, "Generation of 1.5-um band polarization entanglement using silicon wire waveguide," CLEO/QELS 2008, QFE3, May 9, 2008, San Jose.
- Q. Zhang, H. Takesue, C. Langrock, X. Xie, M. M. Fejer, and Y. Yamamoto, "Hong-Ou-Mandel dip using photon pairs from a PPLN waveguide," CLEO/QELS 2008, QFE1, May 9, 2008, San Jose.
- T. Honjo, S. W. Nam, H. Takesue, Q. Zhang, H. Kamada, Y. Nishida, O. Tadanaga, M. Asobe, B. Baek, R. H. Hadfield, S. Miki, M. Fujiwara, M. Sasaki, Z. Wang, K. Inoue, and Y. Yamamoto, "Entanglement-based BBM92 QKD experiment using superconducting single photon detectors," CLEO/QELS 2008, QWB1, May 7, 2008, San Jose.
- H. Takesue, "Quantum communication experiments using entangled photons generated in dispersion shifted fiber," IEEE/LEOS Winter Topicals, January 15, 2008, Sorrento, Italy (invited).
- H. Takesue, "R&D of quantum relay technology at NTT," Updating Quantum Cryptography, UQC 2007, October 3, 2007, Tokyo (invited).
- H. Takesue, H. Fukuda, T. Tsuchizawa, T. Watanabe, K. Yamada, Y. Tokura and S. Itabashi, "Entanglement generation using silicon wire waveguide," Eur. Conf. Opt. Commun. ECOC 2007, postdeadline paper 2.3, September 20, 2007, Berlin.
- K. Inoue, H. Takesue and T. Honjo, "Differential-phase-shift quantum key distribution", SPIE Optics East, 6780-39, Boston, 2007 (invited).
- N. Namekata, G. Fujii, T. Honjo, H. Takesue and S. Inoue, "Quantum key distribution using single-photon detectors based on sinusoidally gated InGaAs/InP avalanche photodiodes", CLEO/Pacific Rim 2007, postdeadline paper PDPA-5.
- T. Honjo, H. Takesue, H. Kamada, Y. Nishida, O. Tadanaga, M. Asobe, K. Inoue, "Long-distance distribution of time-bin entangled photon pairs over 100 km using frequency up-conversion detectors," The 16th laser physics workshop, LPHY' 07, paper 7.7.2 (invited).
- X. Xie, Q. Zhang, C. Langrock, Y. Yamamoto, M. M. Fejer, H. Takesue, and S. W. Nam, "Photon pair generation in reverse-proton-exchange lithium niobate waveguides with mode demultiplexing at a pump repetition rate of 10 GHz," CLEO/QELS 2007, QWF4.
- H. Takesue, "1.5-ƒÊm band Hong-Ou-Mandel experiment using photon pairs generated in two independent optical fibers," CLEO/QELS 2007, JTuA5.
- K. Inoue, H. Takesue and T. Honjo, "Differential phase shift quantum key distribution using single-photon detectors," OFC 2007, OWT2 (invited).
- H. Takesue, E. Diamanti, C. Langrock, M. M. Fejer, and Y. Yamamoto, "100 km secure key distribution using low-jitter up-conversion detectors," The 8th inernational conference on quantum communication, measurement and computing, QCMC '06, SA4-2.
- K. Inoue and H. Takesue, "Generation of entangled photons in fiber and their system applications," Frontier in Optics 2006, FTuR1 (invited).
- Y. Yamamoto, E. Diamanti, H. Takesue, C. Langrock, and M. M. Fejer, "Differential phase shift quantum key distribution," Conference on quantum information and quantum control II, 2006 (invited).
- T. Honjo, H. Takesue and K. Inoue, "Differential-phase quantum key distribution experiment using a series of quantum entangled photon pairs," The 15th laser physics workshop, LPHY' 06, paper 7.7.5.
- E. Diamanti, C. Langrock, E. Waks, M. M. Fejer, Y. Yamamoto, H. Takesue, T. Honjo, and K. Inoue, "Differential phase shift quantum key distribution with up-conversion single-photon detectors," IEEE/LEOS Summer Topicals 2006, TuB1.1 (invited).
- K. Inoue, H. Takesue and T. Honjo, "Differential-phase-shift quantum key distribution," IEEE/LEOS Summer Topicals 2006, TuB1.2 (invited).
- E. Diamanti, C. Langrock, E. Waks, M. M. Fejer, Y. Yamamoto, H. Takesue, T. Honjo, and K. Inoue, "Fast and long-distance differential-phase-shift quantum key distribution," CLEO/QELS 2006, JTuH2.
- T. Honjo, H. Takesue and K. Inoue, " Generation of energy-time entangled photon pairs in 1.5-um band with periodically poled lithium niobate waveguide," CLEO/QELS 2006, JTuA5.
- H. Takesue, "Long-distance distribution of time-bin entangled photon pairs generated in optical fiber cooled by liquid nitrogen," CLEO/QELS 2006, JTuA3.
- H. Takesue, T. Honjo, K. Inoue, E. Diamanti, C. Langrock, M. M. Fejer and Y. Yamamoto, "Ultra-fast differential-phase-shift quantum key distribution using single-photon detectors based on up-conversion in periodically poled lithium niobate waveguides," OFC 2006, OFL2.
- E. Diamanti, C. Langrock, M. M. Fejer, Y. Yamamoto and H. Takesue, "1.5 um photon-counting optical time domain reflectometry with a single-photon detector using up-conversion in a PPLN waveguide," CLEO/QELS 2005, CTuY6.
- C. Langrock, E. Diamanti, R. V. Roussev, Y. Yamamoto, M. M. Fejer and H. Takesue, "Higly efficient single-photon detection at communication wavelengths using upconversion in reverse proton exchanged PPLN waveguides," CLEO/QELS 2005, QThJ1.
- H. Takesue and K. Inoue, "Generation of polarization entangled photon pairs using spontaneous four-wave mixing in fiber loop," The 7th inernational conference on quantum communication, measurement and computing, QCMC '04, P3.18.
- H. Takesue, N. Yoshimoto, T. Ito, Y. Tohmori and T. Sugie, "2.5-Gbit/s wavelength channel data rewriter using semiconductor optical saturator/modulator for drop-and-rewrite WDM networks," in Proc. Eur. Conf. Opt. Commun. ECOC 2003, paper Th2.3.3.
- H. Takesue and T. Sugie, "Data rewrite of wavelength channel using saturated SOA modulator for WDM metro/access networks with centralized light sources," in Proc. Eur. Conf. Opt. Commun. ECOC 2002, paper 8.5.6.
- T. Sato, H. Takesue and T. Sugie, "Photonic access and metropolitan area networks for broadband services," 4th International Conf. on Transparent Optical Networks, 2002. ,Vol.1, pp.21-25, April 2002.
- H. Takesue and T. Horiguchi, "1-THz offset frequency measurement using lightwave synthesized frequency sweeper," in Proc. Microwave Photon. Conf. MWP 2002.
- H. Takesue and T. Horiguchi, "Very fast chromatic dispersion measurement using lightwave synthesized frequency sweeper and lock-in detection with phase diversity technique," in Proc. Opt. Fiber Commun. Conf. OFC 2001, paper WDD87.
- H. Takesue, F. Yamamoto and T. Horiguchi, "Stable lightwave synthesized frequency sweeper for the 1.5 um band," in Proc. Eur. Conf. Opt. Commun. ECOCf98, paper WdA33.

- H. Takesue, T. Inagaki, and T. Honjo, "Solving complex optimization problems with a coherent Ising machine," SPIE Newsroom DOI: 10.1117/2.1201702.006859 (2017).
- H. Takesue, "Applications of superconducting single photon detectors to quantum communications," The Journal of the Institute of Electronics, Information and Communication Engineers 99, 229-234 (2016) (in Japanese).
- H. Takesue, "Experimental quantum cryptography without error rate monitoring," The Journal of the Institute of Electronics, Information and Communication Engineers 99, 158-159 (2016) (in Japanese).
- H. Takesue, "Quantum communication experiments over optical fiber," in Principles and Methods of Quantum Information Technologies (eds. Y. Yamamoto and K. Semba), 53-70, Springer (2016).
- H. Takesue, E. Diamanti, R. Thew, and Z. Yuan, "Introduction to the Issue on Quantum Communication and Cryptography," IEEE J. Selected Topics in Quantum Electronics 21, 0200402 (2015).
- H. Takesue, "Integrated quantum optical circuits on silicon chips," OYO BUTSURI 84, 434-437 (2015) (in Japanese).
- T. Inagaki and H. Takesue, "Distribution of entangled photon pairs over 300 km of optical fiber," NTT Technical Review 12, No. 9 (2014).
- N. Matsuda, H. Takesue, W. J. Munro, E. Kuramochi, and M. Notomi, "Photonic quantum information devices using coupled-resonator optical waveguides," NTT Technical Review 12, No.9 (2014).
- H. Takesue, "An on-chip quantum buffer: a key component for a photonic quantum computer on a chip," The Journal of the Institute of Electronics, Information and Communication Engineers 97, 144 (2014) (in Japanese).
- N. Matsuda, H. Fukuda, T. Tsuchizawa, W. J. Munro, K. Shimizu, K. Yamada, Y. Tokura, H. Takesue, "Monolithic integration of polarization-entangled photon pair source using silicon photonics technology," NTT Technical Review 11, No. 8 (2013).
- H. Takesue, "Quantum communication experiments in telecommunication bands," Optical and Electro-Optical Engineering Contact 51, No. 5, pp. 22-27 (2013) (in Japanese).
- H. Takesue, "Quantum communication using entangled photon pairs?toward quantum repeaters," NTT Technical Review 9, No. 9 (2011).
- H. Takesue, K. Harada, Y. Tokura, H. Fukuda, T. Tsuchizawa, T. Watanabe, K. Yamada, and S. Itabashi, "Entanglement generation using silicon waveguide," Optronics 2011.2, No. 350, pp. 130-133 (2011) (in Japanese).
- H. Takesue, "Progress of quantum cryptography technologies and future perspective," OYO BUTSURI 78, 972 (2009) (in Japanese).
- H. Takesue, K. Harada, Y. Tokura, H. Fukuda, T. Tsuchizawa, T. Watanabe, K. Yamada, and S. Itabashi, "Entanglement generation using silicon wire waveguide," NTT Technical Review 8, No.2 (2010).
- H. Takesue, "Quantum cryptography," MAGUNE (Magnetics Japan) 4, 294 (2009) (in Japanese).
- H. Kamada, T. Tawara, T. Yamaguchi, T. Honjo, H. Takesue, Y. Nishida, O. Tadanaga, M. Asobe, and K. Inoue, "Single-photon and entangle photon pair generation and long-distance distribution in telecommunication bands," KOGAKU 37, 447 (2008) (in Japanese).
- H. Takesue, "eQuantum keyf sent over 200 km of fiber using 10-GHz clock quantum cryptography system," The Journal of the Institute of Electronics, Information and Communication Engineers 90, 906 (2007) (in Japanese).
- H. Takesue, "Generation of entangled photon pairs in telecommunication wavelength band," OYO BUTSURI 75, 1354 (2006) (in Japanese).
- H. Takesue, "Generation of telecom-band quantum entangled photon pairs and its application to quantum key distribution, " Review of the National Institute of Information and Communications Technology 52, No. 3, p. 63 (2006) (in Japanese) / Journal of the National Institute of Information and Communications Technology 53, No.3, p. 69 (2006) (English translation).
- H. Takesue, "Generation of polarization entangled photon pairs in 1.5-um telecommunication band," NTT Gijyutsu Journal, 18, No. 2, 33 (2006) (in Japanese).
- H. Takesue,"Generation of polarization entangled photon pairs in 1.5-um telecommunication band," NTT Technical Review, 3, No. 12, 53 (2005).
- H. Takesue, H. Kawata, K. Hattori, S. Kuwano, Y. Fukada and T. Sugie, "Calculation of crosstalk penalty in hybrid ring systems for access/user networks," NTT R&D, 51, 1015 (2002) (in Japanese).

Japanese presentations, publications and media coverages