Spin correlations as a probe of quantum synchronization in trapped-ion phonon lasers
Spin correlations as a probe of quantum synchronization in trapped-ion phonon lasers
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DOI：
10.1103/physreva.91.061401
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发表时间：
2015-06-04
影响因子：
2.9
通讯作者：
Armour, Andrew D.
中科院分区：
文献类型：
--
作者：
Hush, Michael R.;Li, Weibin;Armour, Andrew D.
本文从理论上研究了微阱中两个冷离子系统的量子同步。离子的运动被驻波激光器阻尼，同时也被导致自振荡的蓝失谐激光器驱动。工作在非经典制度，这些振荡只包含几个声子，并有一个子泊松数方差，我们探讨如何同步发生时，两个离子弱耦合使用相对相位的概率分布。我们发现，强相关性之间产生的自旋和振动的自由度在每个离子，并发现，当两个离子同步的自旋自由度反过来成为相关的。这允许人们通过测量离子的内部状态来间接推断同步的存在。
We investigate quantum synchronization theoretically in a system consisting of two cold ions in microtraps. The ions' motion is damped by a standing-wave laser while also being driven by a blue-detuned laser which results in self-oscillation. Working in a nonclassical regime, where these oscillations contain only a few phonons and have a sub-Poissonian number variance, we explore how synchronization occurs when the two ions are weakly coupled using a probability distribution for the relative phase. We show that strong correlations arise between the spin and vibrational degrees of freedom within each ion and find that when two ions synchronize their spin degrees of freedom in turn become correlated. This allows one to indirectly infer the presence of synchronization by measuring the ions' internal state.