论文标题
基于测量的基态冷却离子振荡器
Measurement-based ground state cooling of a trapped ion oscillator
论文作者
论文摘要
基于测量的冷却是一种方法，量子系统最初可以通过某种测量来制备其基态。这是通过进行预示系统处于所需状态的测量方法来完成的。在这里，我们证明了基于测量的冷却技术在被困的原子离子中的应用。离子由多普勒激光冷却至热状态，平均激发$ \ bar n \约18 $冷却，基于测量的冷却技术会选择当离子恰好处于运动基态的情况下。先驱过程的保真度大于95％。该技术可以应用于其他不适合激光冷却的系统。
Measurement-based cooling is a method by which a quantum system, initially in a thermal state, can be prepared in its ground state through some sort of measurement. This is done by making a measurement that heralds the system being in the desired state. Here we demonstrate the application of a measurement-based cooling technique to a trapped atomic ion. The ion is pre-cooled by Doppler laser cooling to a thermal state with a mean excitation of $\bar n \approx 18$ and the measurement-based cooling technique selects those occasions when the ion happens to be in the motional ground state. The fidelity of the heralding process is greater than 95%. This technique can be applied to other systems that are not as amenable to laser cooling as trapped ions.
