Entanglement concentration for multi-atom GHZ class state via cavity QED |
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| Authors: | Jiang Chun-Lei Fang Mao-Fa and Zheng Xiao-Juan |
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| Affiliation: | College of Physics and Information Science,Hunan Normal University, Changsha 410081, China |
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| 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. |
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| Keywords: | entangled atomic states GHZ
state concentration cavity quantum electrodynamics |
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