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arXiv quant-ph/0410214quant-ph
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拉曼噪声诱导的chi ^3非简并相敏放大和正交压缩的量子极限

Raman-noise induced quantum limits for chi^3 nondegenerate phase-sensitive amplification and quadrature squeezing

Paul L. Voss, Kahraman G. Köprülü, Prem Kumar

摘要:

我们提出了chi ^3非线性介质中非简并相敏参量放大的量子理论。克尔χ ^3非线性的非零响应时间决定了χ ^3参量放大的量子极限噪声系数,以及正交压缩的极限。这种非零响应时间的非线性需要耦合的参数过程的分子振动声子浴,导致额外的噪声通过自发拉曼散射。我们给出了作为相敏放大器工作的频率非简并和频率简并卡方参放大器的量子极限噪声系数的解析表达式。我们也给出了频率非简并正交压缩的结果。结果表明,当简并度接近时,我们的非简并压缩理论与Boivin和Shapiro的简并压缩理论一致。我们还包括了线性损耗对相敏过程的影响。

英文摘要:

We present a quantum theory of nondegenerate phase-sensitive parametric amplification in a chi^3 nonlinear medium. The non-zero response time of the Kerr chi^3 nonlinearity determines the quantum-limited noise figure of chi^3 parametric amplification, as well as the limit on quadrature squeezing. This non-zero response time of the nonlinearity requires coupling of the parametric process to a molecular-vibration phonon bath, causing the addition of excess noise through spontaneous Raman scattering. We present analytical expressions for the quantum-limited noise figure of frequency non-degenerate and frequency degenerate chi^3 parametric amplifiers operated as phase-sensitive amplifiers. We also present results for frequency non-degenerate quadrature squeezing. We show that our non-degenerate squeezing theory agrees with the degenerate squeezing theory of Boivin and Shapiro as degeneracy is approached. We have also included the effect of linear loss on the phase-sensitive process.

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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