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arXiv quant-ph/0410246quant-phcond-mat.stat-mechnlin.CD
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量子混沌跃迁中的纠缠

Entanglement Across a Transition to Quantum Chaos

Carlos Mejia-Monasterio, Giuliano Benenti, Gabriel G. Carlo, Giulio Casati

摘要:

我们研究了一维和二维自旋1/2晶格模型中纠缠与量子混沌的关系,这些模型表现出非相互作用本征函数的混合以及从可积性到量子混沌的转变.与量子相变中发生的情况相反,量子混沌的开始不是基态的性质,而是发生在任何典型的多自旋量子态中。我们研究了两体和两两纠缠的度量,即约化的冯诺伊曼熵和纠缠度,并讨论了量子纠缠的共享。我们的研究结果表明,纠缠的行为是与本征函数的混合,而不是向混沌的过渡。

英文摘要:

We study the relation between entanglement and quantum chaos in one- and two-dimensional spin-1/2 lattice models, which exhibit mixing of the noninteracting eigenfunctions and transition from integrability to quantum chaos. Contrary to what occurs in a quantum phase transition, the onset of quantum chaos is not a property of the ground state but take place for any typical many-spin quantum state. We study bipartite and pairwise entanglement measures, namely the reduced Von Neumann entropy and the concurrence, and discuss quantum entanglement sharing. Our results suggest that the behavior of the entanglement is related to the mixing of the eigenfunctions rather than to the transition to chaos.

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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