标题： 探测纳米机械QED效应 显示英文标题

标题： Probing Nano-Mechanical QED Effects

摘要： 我们提出并研究了一种无需引入任何外部探测器的“本征探测”方法，用以模拟量子比特-纳米机械谐振子系统中的腔量子电动力学效应。 当微弱驱动电流通过时，这种金属纳米机械谐振子可以充当本征探测器。 纳米机械谐振子同时扮演腔体和探测器的角色。 通过纳米机械谐振子两端电动势的相关谱，展示了类似腔QED效应。 利用量子回归定理和微扰理论，我们解析地计算了相关谱。 在弱驱动极限下，我们研究了驱动强度以及电荷量子比特与纳米机械谐振子之间频率失谐对真空拉比劈裂的影响。 数值计算验证了本征探测方法的有效性。 显示英文摘要

摘要： We propose and study an "intrinsic probing" approach, without introducing any external detector, to mimic cavity QED effects in a qubit-nanomechanical resonator system. This metallic nanomechanical resonator can act as an intrinsic detector when a weak driving current passes through it. The nanomechanical resonator acts as both the cavity and the detector. A cavity QED-like effect is demonstrated by the correlation spectrum of the electromotive force between the two ends of the nanomechanical resonator. Using the quantum regression theorem and perturbation theory, we analytically calculate the correlation spectrum. In the weak driving limit, we study the effect on the vacuum Rabi splitting of both the strength of the driving as well as the frequency-detuning between the charge qubit and the nanomechanical resonator. Numerical calculations confirm the validity of our intrinsic probing approach.