Quantum speedup in a memory environment
Quantum speedup in a memory environment
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DOI：
10.1103/physreva.89.012307
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发表时间：
2013-11
影响因子：
2.9
通讯作者：
Zhenyu Xu;S. Luo;W. L. Yang;Chen Liu;Shiqun Zhu
中科院分区：
文献类型：
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作者：
Zhenyu Xu;S. Luo;W. L. Yang;Chen Liu;Shiqun Zhu
记忆（非马尔可夫）效应被发现能够加速量子演化[S. Deffner和E. Lutz，Phys. Rev. Lett. 111，010402（2013）.]。在这项工作中，对于一个原子在一个结构化水库，我们表明，加速的机制不仅与非马尔可夫性，但也激发态的布居在给定的驱动时间。换句话说，非马尔可夫性和激发态布居之间的竞争最终决定了存储环境中量子演化的加速。讨论了在现有技术条件下，利用平面光子晶体腔中的氮空位中心来验证上述现象的一种可能的实验实现。
Memory (non-Markovian) effect is found to be able to accelerate quantum evolution [S. Deffner and E. Lutz, Phys. Rev. Lett. 111, 010402 (2013).]. In this work, for an atom in a structured reservoir, we show that the mechanism for the speedup is not only related to non-Markovianity but also to the population of excited states under a given driving time. In other words, it is the competition between non-Markovianity and population of excited states that ultimately determines the acceleration of quantum evolution in memory environments. A potential experimental realization for verifying the above phenomena is discussed by using a nitrogen-vacancy center embedded in a planar photonic crystal cavity under current technologies.