NTT Basic Research Laboratories


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Quantum Science and Technology Laboratory

Theoretical Quantum Physics Research Group

Dr. Koji Azuma
Group Leader
Dr. Koji Azuma

We are pursuing innovative cutting-edge theoretical research in quantum physics and quantum information processing. We are interested in how it can be applied to the real-world development of quantum-enabled technologies.


Quantum theory is the basis of modern physics and explains the nature and behavior of matter and energy at the atomic level. Its peculiar features, such as superposition and entanglement, open up the possibility of completely new ways to manipulate information. Quantum entanglement, for instance, is the phenomenon in which the state of composite systems can never be expressed by whatever collection of the descriptions of the subsystems. It is believed to be essential for achieving classically intractable applications such as quantum communication and computation. Our group explores such quantum natures and how they can be applied to generate new forms of quantum technology. More specifically, we investigate a) foundational aspects of quantum theory including nonlocal phenomena; b) quantum key distribution and its security; c) techniques for quantum communication, repeaters and computation; e) hybrid quantum systems (composite systems taking the best parts of each). Our group works closely with experimental groups.

  • Dr. Victor Bastidas
    Dr. Victor Bastidas
  • Dr. Takuya Hatomura
    Dr. Takuya Hatomura
  • Dr. Tomohiro Yamazaki
    Dr. Tomohiro Yamazaki
  • Dr. Lewis Ruks
    Dr. Lewis Ruks
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