An optical scheme for conditional generation of W state and photon-added coherent state
Li Yan(李燕)a)b)c)†, Jing Hui(景辉)a)b)‡, and Zhan Ming-Sheng(詹明生)a)b)
a State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, Chinab Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071, China; c Graduate School of the Chinese Academy of Sciences, Beijing 100080, China
Abstract We propose a simple scheme to generate an arbitrary photon-added coherent state of a travelling optical field by combining an array of degenerate parametric amplifiers and corresponding single-photon detectors. Particularly, when the single-photon-added coherent state is observed by developing the novel technique of Zavatta et al (2004 Science 306 660), we can simultaneously obtain the generalized N-qubit W state.
Received: 15 July 2006
Revised: 14 November 2006
Accepted manuscript online:
PACS:
42.50.Ar
Fund: Project supported by the National Natural Science Foundation of China
(Grant Nos~10304020 and 10474117), the State Key Development
Program for Basic Research
of China (Grant No~2001CB309309), and also in part
by the Sunshine Project of Wuhan, China.
Cite this article:
Li Yan(李燕), Jing Hui(景~~辉), and Zhan Ming-Sheng(詹明生) An optical scheme for conditional generation of W state and photon-added coherent state 2007 Chinese Physics 16 1883
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
