Ultracold atoms trapped in an optical lattice.		Entangled cluster state.

Cluster State Generation for Ultracold Atoms in an Optical Lattice

   We theoretically propose a method for generating entanglement of the ultracold atoms trapped in an optical lattice. Our simple method can be implemented with a combination of some established experimental techniques, such as, irradiating lasers and tuning their intensities. Precise numerical simulation confirms that our method can create a high-fidelity multipartite entanglement, that is, the cluster state, in a short operation time with scalability. Our proposal paves the way for creating a large-scale multipartite entanglement that is useful for the measurement based quantum computation. (Page 38)