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Decoherence Sensing of Entangled-Coherent-State Channels via Unambiguous Quantum State Filtering |
| TONG Zhao-Yang; KUANG Le-Man |
| Department of Physics, Hunan Normal University, Changsha 410081 |
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| Cite this article: |
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TONG Zhao-Yang, KUANG Le-Man 2006 Chin. Phys. Lett. 23 1076-1079 |
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Abstract Unambiguous quantum state filtering is applied to evaluation of the decoherence sensing of entangled quantum channels consisting of N-mode entangled coherent states. It is found that quantum entanglement can enhance the performance of decoherence sensing while the increase of the mode numbers in the entangled probe field can slightly improve the sensing performance only in the weak field regime.
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| Keywords:
03.67.2a
03.65.Ta
42.50.Dv
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Published: 01 May 2006
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| PACS: |
03.67.2a
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03.65.Ta
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(Foundations of quantum mechanics; measurement theory)
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42.50.Dv
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(Quantum state engineering and measurements)
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