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arXiv 2402.00883cond-mat.mes-hall
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Benalcazar-Bernevig-Hughes模型中的动力学体边对应关系与动力量子相变

The dynamical bulk boundary correspondence and dynamical quantum phase transitions in the Benalcazar-Bernevig-Hughes model

Tomasz Masłowski, Nicholas Sedlmayr

AI总结:

该研究以Benalcazar-Bernevig-Hughes模型为对象,证实高阶拓扑绝缘体跨拓扑相边界猝灭后存在动力量子相变,观测到动力学体边对应关系,发现其相变表现为返回率尖峰的类一维特征并解释了成因。

摘要:

本文研究表明,作为高阶拓扑绝缘体范例的Benalcazar-Bernevig-Hughes模型,在跨越拓扑相边界的猝灭后会发生动力量子相变。在Loschmidt重叠矩阵的本征值与边界返回率中,均观测到动力学体边对应关系。边界返回率通过有限尺寸标度分析得到,该模型的相对简洁性对这一分析至关重要。与常规二维体系的情况不同,该模型中的动力量子相变表现为返回率的尖峰,与一维模型的特征一致,而非二维体系典型的返回率导数尖峰。本文还解释了这一行为的起源。

英文摘要:

In this article we demonstrate that dynamical quantum phase transitions occur for an exemplary higher order topological insulator, the Benalcazar-Bernevig-Hughes model, following quenches across a topological phase boundary. A dynamical bulk boundary correspondence is also seen both in the eigenvalues of the Loschmidt overlap matrix and the boundary return rate. The latter is found from a finite size scaling analysis for which the relative simplicity of the model is crucial. Contrary to the usual two dimensional case the dynamical quantum phase transitions in this model show up as cusps in the return rate, as for a one dimensional model, rather than as cusps in its derivative as would be typical for a two dimensional model. We explain the origin of this behaviour.

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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