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arXiv 1003.3675quant-phcond-mat.stat-mech
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一般马尔可夫量子动力学的Lieb-Robinson界与定域性

Lieb-Robinson Bound and Locality for General Markovian Quantum Dynamics

David Poulin

摘要:

Lieb-Robinson界证明了在具有局域相互作用的离散量子力学系统中存在信号传播的最大速度。这将相对论因果关系的概念推广到场论之外,并在理论凝聚态物理和量子信息科学中提供了一个强有力的工具。在这里,我们通过考虑一般的马尔可夫量子演化来扩展这个开创性结果的范围,在这里我们证明了一个等价的界。此外,我们使用的广义界证明,在平稳状态的马尔可夫过程的相关性衰减的Lieb-Robinson速度和系统的弛豫时间的长度尺度集。

英文摘要:

The Lieb-Robinson bound shows the existence of a maximum speed of signal propagation in discrete quantum mechanical systems with local interactions. This generalizes the concept of relativistic causality beyond field theory, and provides a powerful tool in theoretical condensed matter physics and quantum information science. Here, we extend the scope of this seminal result by considering general Markovian quantum evolution, where we prove that an equivalent bound holds. In addition, we use the generalized bound to demonstrate that correlations in the stationary state of a Markov process decay on a length-scale set by the Lieb-Robinson velocity and the system's relaxation time.

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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