静态和动态量子相变中的广义纠缠
Generalized entanglement in static and dynamic quantum phase transitions
摘要：
从纠缠的角度研究了一类在交变横向磁场中的一维各向异性XY自旋1/2模型。我们发现，一个物理动机李代数广义纠缠措施忠实地画像的静态相图-包括二阶和四阶量子相变属于不同的普遍性类。在最简单的时间依赖性的情况下，缓慢淬火整个量子临界点，我们确定参数制度纠缠表现出普遍的动态缩放相对于静态限制。
英文摘要：
We investigate a class of one-dimensional, exactly solvable anisotropic XY spin-1/2 models in an alternating transverse magnetic field from an entanglement perspective. We find that a physically motivated Lie-algebraic generalized entanglement measure faithfully portraits the static phase diagram -- including second- and fourth-order quantum phase transitions belonging to distinct universality classes. In the simplest time-dependent scenario of a slow quench across a quantum critical point, we identify parameter regimes where entanglement exhibits universal dynamical scaling relative to the static limit.
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