Abstract In this paper, we propose a physical scheme to concentrate non-maximally entangled atomic pure states by using atomic collision in a far-off-resonant cavity. The most distinctive advantage of our scheme is that the non-maximally entangled atoms may be far from or near each other and their degree of entanglement can be maximally amplified. The photon-number-dependent parts in the effective Hamiltonian are cancelled with the assistance of a strong classical field, thus the scheme is insensitive to both the cavity decay and the thermal field.
Received: 28 March 2006
Revised: 10 July 2006
Accepted manuscript online:
Fund: Project supported by the National
Natural Science Foundation of China (Grant No 10374025).
Cite this article:
Jiang Chun-Lei(姜春蕾), Fang Mao-Fa(方卯发), and Zheng Xiao-Juan(郑小娟) Entanglement concentration for multi-atom GHZ class state via cavity QED 2006 Chinese Physics 15 2953
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