论文标题
非高斯量子噪声的光谱表征：Keldysh方法和应用于光子射击噪声
Spectral characterization of non-Gaussian quantum noise: Keldysh approach and application to photon shot noise
论文作者
论文摘要
具有描述非古典，非高斯环境波动的准确工具对于设计有效的量子控制方案和理解基本量子耗散环境的物理学至关重要。我们展示了如何使用Keldysh量子噪声表征的方法来表征频率依赖性噪声，重点是量子双光谱（即频率分辨的第三累积液）。使用以驱动的骨器模式的光子射击噪声波动的范式示例，我们表明量子双光谱可以是揭示独特的非经典噪声特性的强大工具，包括通过量子波动来有效破坏详细的平衡。可以使用现有的噪声光谱协议直接访问Keldysh订购的量子双光谱。
Having accurate tools to describe non-classical, non-Gaussian environmental fluctuations is crucial for designing effective quantum control protocols and understanding the physics of underlying quantum dissipative environments. We show how the Keldysh approach to quantum noise characterization can be usefully employed to characterize frequency-dependent noise, focusing on the quantum bispectrum (i.e., frequency-resolved third cumulant). Using the paradigmatic example of photon shot noise fluctuations in a driven bosonic mode, we show that the quantum bispectrum can be a powerful tool for revealing distinctive non-classical noise properties, including an effective breaking of detailed balance by quantum fluctuations. The Keldysh-ordered quantum bispectrum can be directly accessed using existing noise spectroscopy protocols.
