Simulating Zeno physics by a quantum quench with superconducting circuits
Simulating Zeno physics by a quantum quench with superconducting circuits
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DOI：
10.1103/physreva.89.060101
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发表时间：
2013-10
影响因子：
2.9
通讯作者：
Qing-Jun Tong;J. An;L. Kwek;Hong-Gang Luo;C. Oh
中科院分区：
文献类型：
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作者：
Qing-Jun Tong;J. An;L. Kwek;Hong-Gang Luo;C. Oh
研究量子猝灭下量子系统的非平衡物理具有重要的实验和理论意义。利用周期性的量子猝灭，我们提出了一个实验可行的方案来模拟单个超导量子比特与传输线谐振器阵列相互作用的开放量子系统中的量子Zeno和反Zeno效应。该方案是基于以下两个观察：第一，与传统的系统相比，我们的超导电路系统中的短时间非指数衰减是很容易观察到的;第二，淬火过程模仿理想的投影测量时，它的持续时间是足够长的。我们的结果表明量子猝灭在量子模拟和控制中的积极作用。
Studying out-of-equilibrium physics in quantum systems under quantum quench is of vast experimental and theoretical interest. Using periodic quantum quenches, we present an experimentally accessible scheme to simulate the quantum Zeno and anti-Zeno effects in an open quantum system of a single superconducting qubit interacting with an array of transmission line resonators. The scheme is based on the following two observations: First, compared with conventional systems, the short-time nonexponential decay in our superconducting circuit system is readily observed; and second, a quench-off process mimics an ideal projective measurement when its time duration is sufficiently long. Our results show the active role of quantum quench in quantum simulation and control.