Near-deterministic generation of three-modeW-type entangled coherent states in free-travelling optical fields
Yu Guo, Deng Hong-Liang · Journal of Physics B Atomic Molecular and Optical Physics · 2009
In this paper, we propose an optical scheme to generate three-mode W -type entangled coherent states (ECSs) in free-travelling optical fields by using a single-photon source, coherent state sources, beam splitters, photodetectors and cross-Kerr media. The success probability of our protocol approaches unity in the ideal case. We also analyse that our scheme can be generalized to produce other N -mode W -type ECSs ( N ≠ 2 n ) nearly deterministically through choosing the beam splitters with appropriate reflectance.