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arXiv 0905.0560quant-ph
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量子注入光参量放大器的Wigner函数理论与退相干

Wigner-function theory and decoherence of the quantum-injected optical parametric amplifier

Nicolo' Spagnolo, Chiara Vitelli, Tiziano De Angelis, Fabio Sciarrino, Francesco De Martini

摘要:

最近的实验结果证明了量子叠加(MQS)的产生,涉及超过5 × 10^4的光子数,这显示出对损失的高弹性。为了全面分析去相干效应对量子注入光参量放大器(QIOPA)获得的多光子场的影响,我们从理论上研究了有耗条件下与这些态相关的Wigner函数的演化。认识到存在的负区域的W-表示作为非经典性的证据,我们集中我们的分析这一功能。与基于相干态的MQS的密切比较允许识别差异和类比。

英文摘要:

Recent experimental results demonstrated the generation of a quantum superpositon (MQS), involving a number of photons in excess of 5x10^4, which showed a high resilience to losses. In order to perform a complete analysis on the effects of de-coherence on this multiphoton fields, obtained through the Quantum Injected Optical Parametric Amplifier (QIOPA), we invesigate theoretically the evolution of the Wigner functions associated to these states in lossy conditions. Recognizing the presence of negative regions in the W-representation as an evidence of non-classicality, we focus our analysis on this feature. A close comparison with the MQS based on coherent states allows to identify differences and analogies.

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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