We put forth the concept of quantum noise sensing in nonlinear two-mode interferometers coupled to mechanical oscillators. These autonomous machines are capable of sensing quantum nonlinear correlations of two-mode noisy fields via their thermodynamic variable of extractable work, alias work capacity (WC) or ergotropy. The fields are formed by thermal noise input via its interaction with multi-level systems inside the interferometer. Such interactions amount to the generation of two-mode quantum nonlinear gauge fields that may be partly unknown. We show that by monitoring a mechanical oscillator coupled to the interferometer, one can sense the WC of one of the output field modes and thereby reveal the quantum nonlinear correlations of the field. The proposed quantum sensing method can provide an alternative to quantum multiport interferometry where the output field is unraveled by tomography. This method may advance the simulation and control of multimode quantum nonlinear gauge fields.

中文翻译：

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量子非线性噪声相关性的热力学传感


我们提出了与机械振荡器耦合的非线性双模干涉仪中的量子噪声传感的概念。这些自主机器能够通过可提取功的热力学变量、别名功能力（WC）或ergotropy来感测双模噪声场的量子非线性相关性。这些场是由热噪声输入通过与干涉仪内部的多级系统相互作用而形成的。这种相互作用相当于产生部分未知的双模量子非线性规范场。我们表明，通过监测耦合到干涉仪的机械振荡器，人们可以感测输出场模式之一的 WC，从而揭示该场的量子非线性相关性。所提出的量子传感方法可以提供量子多端口干涉测量的替代方案，其中输出场通过断层扫描来揭示。该方法可以推进多模量子非线性规范场的模拟和控制。