Bose-Hubbard lattice as a controllable environment for open quantum systems
Bose-Hubbard lattice as a controllable environment for open quantum systems
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DOI：
10.1103/physreva.97.040101
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发表时间：
2017-06
影响因子：
2.9
通讯作者：
F. Cosco;M. Borrelli;J. J. Mendoza-Arenas-J.;F. Plastina;D. Jaksch;S. Maniscalco
中科院分区：
文献类型：
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作者：
F. Cosco;M. Borrelli;J. J. Mendoza-Arenas-J.;F. Plastina;D. Jaksch;S. Maniscalco
研究了一维玻色-哈伯德晶格中杂质原子的开放动力学。我们推导出减少的杂质的演化方程，并表明，玻色-哈伯德晶格的行为作为一个可调的工程环境，允许一个模拟马尔可夫和非马尔可夫动力学的控制和实验可实现的方式。我们证明，记忆效应的存在或不存在是由杂质引起的激发的性质的签名，被离域或本地化的两个极限情况下的超流体和莫特绝缘体，分别。此外，我们的研究结果表明，在这两个阶段中支持的激励可以被描述为信息载体。
We investigate the open dynamics of an atomic impurity embedded in a one-dimensional Bose-Hubbard lattice. We derive the reduced evolution equation for the impurity and show that the Bose-Hubbard lattice behaves as a tunable engineered environment allowing one to simulate both Markovian and non-Markovian dynamics in a controlled and experimentally realizable way. We demonstrate that the presence or absence of memory effects is a signature of the nature of the excitations induced by the impurity, being delocalized or localized in the two limiting cases of a superfluid and Mott insulator, respectively. Furthermore, our findings show how the excitations supported in the two phases can be characterized as information carriers.