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Quantum Nonlocally Correlated Observables for Non-Gaussian States |
| LI Hong-Rong1**, LI Fu-Li1, ZHU Shi-Yao2
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1MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter and Department of Applied Physics, Xi'an Jiaotong University, Xi'an 710049
2Department of Physics, Hong Kong Baptist University, Hong Kong
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| Cite this article: |
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LI Hong-Rong, LI Fu-Li, ZHU Shi-Yao 2011 Chin. Phys. Lett. 28 050310 |
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Abstract Quantum nonlocally correlated observables of the squeezed Bell-like states are investigated. We find that the higher amount of the entanglement does not always mean the stronger correlation of positions and momentums in the non-Gaussian states such as the photon-added states and the squeezed number states. Quantum nonlocal correlations of the amplitude-squared operators signal the entanglement existence of all the squeezed Bell-like states.
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| Keywords:
03.67.Hk
03.67.Mn
42.50.Dv
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Received: 15 November 2010
Published: 26 April 2011
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| PACS: |
03.67.Hk
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(Quantum communication)
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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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