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arXiv 1602.08281quant-ph
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一类有限闭自旋系统中某些量子历史近似一致性和马尔可夫性的数值证据

Numerical Evidence for Approximate Consistency and Markovianity of some Quantum Histories in a Class of Finite Closed Spin Systems

Daniel Schmidtke, Jochen Gemmer

摘要:

封闭的量子系统服从薛定谔方程,而许多系统的非平衡行为通常用经典的马尔可夫随机过程来描述。显然,这两种行为之间存在根本差异。我们讨论的条件下,酉动力学可以映射到相关的经典随机过程。首先从“一致性”和“马尔可夫性”的概念出发,对这一问题进行了初步探讨。“数值数据表明,上述条件是很好的近似满足海森堡型自旋模型包括12-20自旋。满足这些条件的精度随着系统尺寸的增加而增加。

英文摘要:

Closed quantum systems obey the Schroedinger equation whereas nonequilibrium behavior of many of systems is routinely described in terms of classical, Markovian stochastic processes. Evidently, there are fundamental differences between those two types of behavior. We discuss the conditions under which the unitary dynamics may be mapped onto pertinent classical stochastic processes. This is first principally addressed based on the notions of "consistency" and "Markovianity." Numerical data are presented that show that the above conditions are to good approximation fulfilled for Heisenberg-type spin models comprising 12-20 spins. The accuracy to which these conditions are met increases with system size.

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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