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arXiv quant-ph/0011006quant-ph
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相干态的纠缠与退相干

Entanglement of coherent states and decoherence

Radim Filip, Jaroslav Rehacek, Miloslav Dusek

摘要:

讨论了产生强相干态纠缠叠加的可能性。本文对Howell和Yazell最近提出的一种使两个强相干相干态纠缠的装置[Phys.Rev.A62,012102(2000)]进行了批判性的研究。提出了一种新的改进方案,证明了该方案确实能产生违反贝尔不等式的非经典态。此外,深入分析了损耗和退相干对纠缠度的影响。它揭示了设备对任何干扰的高灵敏度和生成状态的脆弱性。

英文摘要:

A possibility to produce entangled superpositions of strong coherent states is discussed. A recent proposal by Howell and Yazell [Phys. Rev. A 62, 012102 (2000)] of a device which entangles two strong coherent coherent states is critically examined. A serious flaw in their design is found. New modified scheme is proposed and it is shown that it really can generate non-classical states that can violate Bell inequality. Moreover, a profound analysis of the effect of losses and decoherence on the degree of entanglement is accomplished. It reveals the high sensitivity of the device to any disturbances and the fragility of generated states.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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