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arXiv 0904.3746cond-mat.stat-mechcond-mat.quant-gas
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有限一维系统热化的破缺

Breakdown of thermalization in finite one-dimensional systems

Marcos Rigol

摘要:

我们利用量子猝灭来研究有限一维晶格中硬核玻色子的动力学和热化。我们进行精确的对角化,并发现,远离可积性,少体观测热化。然后,我们研究的故障热化作为一个接近可积点。这被发现是一个平稳的过程中,标准的统计力学的预测不断恶化的系统走向可积性。我们分别建立了热化的存在或不存在与本征态热化假设的有效性或失败之间的直接联系。

英文摘要:

We use quantum quenches to study the dynamics and thermalization of hardcore bosons in finite one-dimensional lattices. We perform exact diagonalizations and find that, far away from integrability, few-body observables thermalize. We then study the breakdown of thermalization as one approaches an integrable point. This is found to be a smooth process in which the predictions of standard statistical mechanics continuously worsen as the system moves toward integrability. We establish a direct connection between the presence or absence of thermalization and the validity or failure of the eigenstate thermalization hypothesis, respectively.

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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