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arXiv 0907.3825quant-ph
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近阈值光学参量振荡器产生的非高斯态:经典和量子涨落的作用

Non-Gaussian states produced by close-to-threshold optical parametric oscillators: role of classical and quantum fluctuations

Virginia D'Auria, Corrado de Lisio, Alberto Porzio, Salvatore Solimeno, Javaid Anwar, Matteo G. A. Paris

摘要:

利用外场求积的峰度过剩,研究了参量起伏的光学参量振荡器(OPO)产生的非高斯统计量子态。产生的场被看作是非线性器件对激光泵浦幅度和频率、晶体温度和腔失谐的波动以及量子噪声源的响应。峰度过剩已被评估为三阶的晶体非线性耦合因子的强度和二阶的经典波动参数的微扰。适用于Opt. Expr. 13,948-956(2005)中,该模型给出了与测量值非常一致的库尔托西过剩值。

英文摘要:

Quantum states with non-Gaussian statistics generated by optical parametric oscillators (OPO) with fluctuating parameters are studied by means of the Kurtosis excess of the external field quadratures. The field generated is viewed as the response of a nonlinear device to the fluctuations of laser pump amplitude and frequency, crystal temperature and cavity detuning, in addition to quantum noise sources. The Kurtosis excess has been evaluated perturbatively up to the third order in the strength of the crystal nonlinear coupling factor and the second order in the classical fluctuating parameters. Applied to the device described in Opt. Expr. 13, 948-956 (2005) the model has given values of the Kurtosi excess in good agreement with the measured ones.

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