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arXiv 1602.00286quant-ph
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多体系统中量子相干性的分布

Distribution of quantum coherence in multipartite systems

R. Chandrashekar, P. Manikandan, J. Segar, Tim Byrnes

摘要:

研究了多部系统中相干性的分布。我们使用一种新的相干性测度熵的性质和度量的性质,基于量子詹森-香农发散。度量属性允许的相干性被分解成各种贡献,这产生于本地和内在的相干性。我们发现,作为量子态参数的函数,相干性的各种贡献之间存在着权衡关系。在二分系统中,连贯性存在于单个站点或分布在站点之间,这些站点以互补的方式做出贡献。在更复杂的复杂系统中,相干性的特征可以相对于量子态的参数表现出更微妙的变化。在XXZ海森堡模型的情况下,相干性从一夫一妻制的性质变成了一夫多妻制的性质。这使我们能够定义连贯性的可分享性,从而导致连贯性的一夫一妻制关系。

英文摘要:

The distribution of coherence in multipartite systems in examined. We use a new coherence measure with entropic nature and metric properties, based on the quantum Jensen-Shannon divergence. The metric property allows for the coherence to be decomposed into various contributions, which arise from local and intrinsic coherences. We find that there are trade-off relations between the various contributions of coherence, as a function of parameters of the quantum state. In bipartite systems the coherence resides on individual sites or distributed among the sites, which contribute in a complementary way. In more complex systems, the characteristics of the coherence can display more subtle changes with respect to the parameters of the quantum state. In the case of the XXZ Heisenberg model, the coherence changes from a monogamous to a polygamous nature. This allows us to define the shareability of coherence, leading to monogamy relations for coherence.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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