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Inseparability of Phase-Damped Bipartite Gaussian States |
| JIANG Li-Zhen |
| College of Information and Electronic Engineering, Zhejiang Gongshang University, Hangzhou 310018 |
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| Cite this article: |
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JIANG Li-Zhen 2009 Chin. Phys. Lett. 26 100303 |
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Abstract 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.
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| Keywords:
03.65.Ud
03.67.Mn
42.50.Dv
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Received: 18 December 2008
Published: 27 September 2009
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| PACS: |
03.65.Ud
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(Entanglement and quantum nonlocality)
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03.67.Mn
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(Entanglement measures, witnesses, and other characterizations)
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42.50.Dv
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(Quantum state engineering and measurements)
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