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Inseparability of Phase-Damped Bipartite Gaussian States

Inseparability of Phase-Damped Bipartite Gaussian States
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摘要 For bipartite non-Gaussian states which are prepared by applying the phase damping to Gaussian states, we use Fock subspace inseparable criterion and the Shchukin-Vogel inseparable criterion to analyze their inseparability. The lowest order of the two criteria is obtained. Fock subspace criterion is more efficient in detecting the entanglement of damped Gaussian state by numerical results. Two photon Fock subspace criterion does not improve the entanglement detecting condition. For bipartite non-Gaussian states which are prepared by applying the phase damping to Gaussian states, we use Fock subspace inseparable criterion and the Shchukin-Vogel inseparable criterion to analyze their inseparability. The lowest order of the two criteria is obtained. Fock subspace criterion is more efficient in detecting the entanglement of damped Gaussian state by numerical results. Two photon Fock subspace criterion does not improve the entanglement detecting condition.
作者 蒋丽珍
出处 《Chinese Physics Letters》 SCIE CAS CSCD 2009年第10期16-19,共4页 中国物理快报(英文版)
基金 Supported by the National Natural Science Foundation of China under Grant No 10575092.
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