Preparation of W state in resonant bimodal cavity quantum electrodynamics
Jia Lian-Jun(贾连军)a)† and Yang Zhen-Biao(杨贞标)b)
a Department of Physics, Lanzhou University, Lanzhou 730000, China; b Department of Electronic Science and Applied Physics, Fuzhou University, Fuzhou 350002, China
Abstract A scheme is proposed for generating entangled W states with four cavity modes. In this scheme, we send a V-type three-level atom through two identical two-mode cavities in succession. After the atom exits from the second cavity, the four cavity modes are prepared in the W state. On the other hand we can obtain three-atom W states by sending three V-type three-level atoms through a two-mode cavity in turn. The present scheme does not require conditional measurement, and it is easily generalized to preparing $2n$-mode W states and $n$-atom W states.
Received: 17 January 2007
Revised: 28 March 2007
Accepted manuscript online:
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