Generation of three-mode W-type entangled coherent states in free-travelling optical fields

Nguyen Ba An, Trần Thái Hòa

Jing-Ji Wen, Kyu-Hwang Yeon, Hong‐Fu Wang +1 more

Jing-Ji Wen, Kyu-Hwang Yeon, Lili Zhang +4 more

郭裕 郭裕, 匡乐满, Guo Yu

We propose a scheme for generation of 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 three-mode cross-Kerr media. The scheme consists of a Mach-Zehnder interferometer (MZI) in which each arm contains a cross-Kerr medium. We calculate the success probability of the generated W-type ECSs, and the total success probability is unity under the ideal conditions.

Yu Guo, Deng Hong-Liang

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.

Chun-Hua Yuan, 欧永成, 张智明