标题： 大振幅机械相干态与腔光力学中弱非线性的探测 显示英文标题

标题： Large amplitude mechanical coherent states and detection of weak nonlinearities in cavity optomechanics

摘要： 对大振幅相干态的制备及其量子极限探测代表了量子传感和检验基础物理理论的有力工具。 事实上，任何微弱扰动都可能影响所准备态的相干量子演化，从而提供对该扰动的一个灵敏探针。 在此我们考虑一个腔光力系统以及微弱机械非线性探测的情形。 我们考虑不同的策略，首先聚焦于存在多个驱动频率时系统的稳态动力学，然后考虑非平衡动力学策略。 这些方法可以成功用于测量类似于杜芬非线性的材料非线性，或者与量子引力理论相关的有效非线性修正。 显示英文摘要

摘要： The generation of large-amplitude coherent states of a massive mechanical resonator, and their quantum-limited detection represent useful tools for quantum sensing and for testing fundamental physics theories. In fact, any weak perturbation may affect the coherent quantum evolution of the prepared state, providing a sensitive probe for such a perturbation. Here we consider a cavity optomechanical setup and the case of the detection of a weak mechanical nonlinearity. We consider different strategies, first focusing on the stationary dynamics in the presence of multiple tones driving the system, and then focusing on non-equilibrium dynamical strategies. These methods can be successfully applied for measuring Duffing-like material nonlinearities, or effective nonlinear corrections associated with quantum gravity theories.