论文标题
通过测量一个辅助系统同时冷却
Simultaneous cooling by measuring one ancillary system
论文作者
论文摘要
我们通过辅助$ v $ -Type Qutrit的投影测量值提出了一个双谐振系统的同时冷却协议。通过在辅助系统的基态上重复测量，可以将两个谐振器从热状态冷却到各自的基态。关于基于测量的冷却，首次在分析上获得了优化的测量间隔$τ_ {\ rm opt} $，这与集体热兔频率$ $ω_ {\ rm th} $成反比，这是回归者上一轮平均人群的功能。在大约20美元的优化尺寸下，目标谐振器的平均人口可减少$ 6 $的订单。我们的同时或集体冷却协议可扩展到具有更多谐振器的系统，并在谐振器频率中稳健。
We present a simultaneous-cooling protocol for a double-resonator system via projective measurements on an ancillary $V$-type qutrit. Through repeated measurements on the ground state of the ancillary system, the two resonators can be cooled down to their respective ground states from thermal states. With respect to the measurement-based cooling, an optimized measurement-interval $τ_{\rm opt}$ is analytically obtained for the first time, which is inversely proportional to the collective thermal Rabi frequency $Ω_{\rm th}$ as a function of the resonators' average population of the last round. Under about only $20$ optimized measurements, the average population of the target resonators can be reduced by $6$ orders in magnitude. Our simultaneous or collective cooling protocol is scalable to the systems with more numbers of resonators and robust to the fluctuation in the resonator frequency.
