论文标题
光学条件机械系统的宏观量子
Macroscopic quantumness of optically conditioned mechanical systems
论文作者
论文摘要
我们探讨了遵守符合有条件方案的机械系统状态的宏观量子，该方案为腔光力学中的状态工程设计而设计。我们使用基于相位方法的宏观量度进行衡量。我们涵盖了从弱到强的光学机电耦合的域，说明了在驱动机械系统动力学的腔场上执行的测量值能够将后者引导到大量子相干状态。对于开放腔的情况，评估了损失的效果，并根据机械系统状态的Wigner函数的特征进行了分析。我们还以完整的开放系统配置解决了工程式声子提取的机械系统的案例，以表明出于介绍量子的目的，存在最佳工作点。我们的研究与从夹紧到悬浮的机械系统的广泛设置有关，并且适用于广泛的设置。
We address the macroscopic quantumness of the state of mechanical systems subjected to conditional protocols devised for state engineering in cavity optomechanics. We use a measure of macroscopicity based on phase-space methods. We cover the domain from weak to strong optomechanical coupling, illustrating how measurements performed over the cavity field that drives the dynamics of a mechanical system are able to steer the latter towards large quantum coherent states. The effect of losses is evaluated for the case of an open cavity, and analyzed in terms of the features of the Wigner functions of the state of the mechanical system. We also address the case of engineered phonon-subtracted mechanical systems, in full open-system configuration, demonstrating the existence of optimal working points for the sake of mesoscopic quantumness. Our study is relevant for and applicable to a broad range of settings, from clamped to levitated mechanical systems.
