Targeting pure quantum states by strong noncommutative dissipation
Targeting pure quantum states by strong noncommutative dissipation
复制标题
通过强非交换耗散瞄准纯量子态
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
J. Schmidt
中科院分区：
文献类型：
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作者：
V. Popkov;C. Presilla;J. Schmidt
基于相干动力学和耗散动力学的同时存在，在强耗散的极限下，对实现预定义的任意纯量子态的问题提出了一种解决方案.更准确地说，我们得到了Lindblad主方程所描述的开放量子系统的非平衡定态（NESS）接近Zeno区目标纯态的一个充要判据，即，对于无限大的耗散耦合。我们还提供了一个明确的公式的特征耗散强度超过该纯度的NESS变得有效，从而铺平了道路，我们的标准的实验实施。为了说明，我们处理目标贝尔状态，$N$量子比特的任意纯态和$N$量子比特的自旋螺旋态。
We propose a solution to the problem of realizing a predefined and arbitrary pure quantum state, based on the simultaneous presence of coherent and dissipative dynamics, noncommuting on the target state and in the limit of strong dissipation. More precisely, we obtain a necessary and sufficient criterion whereby the nonequilibrium steady state (NESS) of an open quantum system described by a Lindblad master equation approaches a target pure state in the Zeno regime, i.e., for infinitely large dissipative coupling. We also provide an explicit formula for the characteristic dissipative strength beyond which the purity of the NESS becomes effective, thus paving the way to an experimental implementation of our criterion. For an illustration, we deal with targeting a Bell state, an arbitrary pure state of $N$ qubits, and a spin-helix state of $N$ qubits.
影响因子：
8.6
作者：
Cho, Jaeyoon;Bose, Sougato;Kim, M. S.
通讯作者：
Kim, M. S.