标题： 混合量子经典动力学产生非谐Rabi振荡 显示英文标题

标题： Mixed Quantum-Classical Dynamics Yields Anharmonic Rabi Oscillations

摘要： 我们应用混合量子-经典（MQC）方法到量子Rabi模型，涉及一个经典光场与一个量子二能级系统自洽耦合。 在旋转波近似下，我们分析表明该方法可以产生持续但非简谐的Rabi振荡，由无阻尼且无外力的Duffing方程控制。 我们考虑单量子极限，在此情况下，我们发现当初始化光场坐标时近似强制零点能后，这种非简谐Rabi振荡能够紧密跟随全量子结果。 我们的研究结果为将MQC动力学应用于涉及小量子数且远离退相干的问题类别提供了指导。 显示英文摘要

摘要： We apply a mixed quantum-classical (MQC) approach to the quantum Rabi model, involving a classical optical field coupled self-consistently to a quantum two-level system. Under the rotating wave approximation, we analytically show this approach to yield persistent yet anharmonic Rabi oscillations, governed by an undamped and unforced Duffing equation. We consider the single-quantum limit, where we find such anharmonic Rabi oscillations to closely follow full-quantum results once zero-point energy is approximately enforced when initializing the optical field coordinate. Our findings provide guidance in the application of MQC dynamics to classes of problems involving small quantum numbers and far away from decoherence.