论文标题
最佳量子参数反馈冷却
Optimal quantum parametric feedback cooling
论文作者
论文摘要
我们提出了一个最佳协议，使用相位保护量子测量值和参数共振诱捕电势的相位依赖性调制，以冷却量子振荡器，以使职业数量少于一个量子。我们得出了参数调制的最佳相位关系和持续时间，并计算稳定状态下最低的职业数字。该协议在反馈回路中的中等耗散和相位误差方面具有鲁棒性。我们的工作对量子制度中悬浮的机械谐振器的冷却有影响。
We propose an optimal protocol using phase-preserving quantum measurements and phase-dependent modulations of the trapping potential at parametric resonance to cool a quantum oscillator to an occupation number of less than one quantum. We derive the optimal phase relationship and duration for the parametric modulations, and compute the lowest-possible occupation number in the steady state. The protocol is robust against moderate amounts of dissipation and phase errors in the feedback loop. Our work has implications for the cooling of levitated mechanical resonators in the quantum regime.
