arXiv 0911.06572009-11quant-ph

电光相位调制的量子模型

Quantum Model for Electro-Optical Phase Modulation

Jose Capmany, Carlos R. Fernandez-Pousa

备注：: 31 pages, 7 figures
发表信息：: J. Opt. Soc. Amer. B, 27 A119-A129 (2010)
DOI：: 10.1364/JOSAB.27.00A119

摘要：

本文详细分析了电光相位调制的量子描述。结果定义了一个黑箱型模型，该设备可能是特别有用的工程步骤，导致复杂的量子信息系统的设计，包括一个或多个这些设备。通过构建一个明确的表示的相位调制散射算子，它表明，完全基于其经典描述的方法导致非物理模式与非正频率。修改后，该运营商，相位调制描述，第一次尽我们所知，在一个单一的散射运营商定义的正频率模式。在相位调制边带产生过程中引入的修改被证明是不显着的辐射时，属于光学波段，从而与经典的描述是一致的。最后，该模型被用来表征的重要情况下，多音射频调制的光信号。

英文摘要：

We present a detailed analysis of the quantum description of electro-optical phase modulation. The results define a black-box type model for this device which may be especially useful in the engineering steps leading to the design of complex quantum information systems incorporating one or more of these devices. By constructing an explicit representation of the phase modulation scattering operator, it is shown that an approach based entirely on its classical description leads to unphysical modes associated to non-positive frequencies. After modifying this operator, phase modulation is described, for the first time to the best of our knowledge, in terms of a unitary scattering operator defined over positive-frequency modes. The modifications introduced by in the process of sideband generation by phase modulation are shown to be not significant when the radiation belongs to optical bands, thus being consistent with the classical description. Finally, the model is employed to characterize the important case of multitone radiofrequency modulation of an optical signal.

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