AI 中文总结
研究相干驱动非厄米简并参量振荡器，利用输入 - 输出理论获得相关闭式表达式，发现非厄米贡献能增强压缩，打开工作窗口，所得参数图确定了实验可测试窗口，展示了库工程与相干驱动结合增强压缩的环境辅助方法。
AI 中文摘要
非经典光的环境辅助方法为在不完美、有损耗的平台中实现强压缩提供了一条实用途径。本文研究了一个简并参量振荡器，其中相干驱动腔通过单端口镜耦合到宽带压缩库。腔内动力学包含非厄米（增益 - 损耗不平衡）项。在输入 - 输出理论内，我们得到了稳态正交方差、输出压缩谱和功率谱的闭式表达式，并描绘了它们对库压缩因子、相干驱动幅度和参量增益的依赖性。我们发现非厄米贡献打开了工作窗口，腔内正交噪声在该窗口中显著低于标准量子极限，并且根据参数设置，要么锐化要么放大输出处的谱压缩和功率谱特征。非厄米系数被视为有效低阶漂移参数，描述了在消除辅助自由度后工程化源和汇通道之间的校准不平衡。分析限于漂移矩阵稳定且压缩库扩散矩阵保持物理性质的稳定高斯区域。结果展示了一种环境辅助方法，其中库工程和相干驱动共同作用以增强压缩。所得参数图确定了在腔量子电动力学和非线性光子学设置中结合库压缩、相干驱动和受控增益/损耗不平衡的实验可测试窗口，而非唯一的器件处方。
英文摘要
Environment-assisted approaches to nonclassical light offer a practical path to strong squeezing in imperfect, lossy platforms. In this paper, we study a degenerate parametric oscillator in which a coherently driven cavity is coupled to a broadband squeezed reservoir via a single-port mirror. At the same time, the intracavity dynamics include non-Hermitian (gain-loss-imbalanced) terms. Within input--output theory, we obtain closed-form expressions for the steady-state quadrature variances, the output squeezing spectrum, and the power spectrum, and map their dependence on the reservoir squeeze factor, the coherent drive amplitude, and the parametric gain. We find that the non-Hermitian contributions open operating windows in which the intracavity quadrature noise is markedly suppressed below the standard quantum limit and, depending on the parameter set, either sharpen or amplify spectral squeezing and power-spectral features at the output. The non-Hermitian coefficients are treated as effective, low-order drift parameters that describe calibrated imbalance between engineered source and sink channels after auxiliary degrees of freedom have been eliminated. The analysis is restricted to the stable Gaussian regime in which the drift matrix is stable, and the squeezed-reservoir diffusion matrix remains physical. The results demonstrate an environment-assisted approach in which reservoir engineering and coherent driving work together to enhance squeezing. The resulting parameter maps identify experimentally testable windows, rather than a unique device prescription, for combining reservoir squeezing, coherent driving, and controlled gain/loss imbalance in cavity-QED and nonlinear photonic settings.
Comments11 pages, 8 figures, 1 table
Journal refResults Phys. 88, 108735 (2026)
DOI：10.1016/j.rinp.2026.108735
