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arXiv 0903.0895cond-mat.stat-mechquant-ph
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热初态的量子猝灭

Quantum Quench from a Thermal Initial State

Spyros Sotiriadis, Pasquale Calabrese, John Cardy

摘要:

我们考虑一个自由玻色子系统中的量子猝灭,从一个热的初始状态。与系统初始处于基态的情况一样,任何有限子系统最终都将达到一个稳定的热态,其有效温度与动量有关。我们发现,在某些情况下,这甚至可以低于初始温度。我们还研究晶格效应,并讨论更一般类型的淬火。

英文摘要:

We consider a quantum quench in a system of free bosons, starting from a thermal initial state. As in the case where the system is initially in the ground state, any finite subsystem eventually reaches a stationary thermal state with a momentum-dependent effective temperature. We find that this can, in some cases, even be lower than the initial temperature. We also study lattice effects and discuss more general types of quenches.

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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