论文标题
动态量子相变而没有订单参数
Dynamical Quantum Phase Transition Without An Order Parameter
论文作者
论文摘要
多体系统的短时动力学可能在特定时间表现出系统特性的非分析行为，因此称为动态量子相变。模拟表明，在存在疾病的情况下，新的关键时期出现在Ising模型的淬火演化中。我们研究这些新的关键时期背后的物理学。我们讨论了负责疾病引起的相变的Ising模型的光谱特征。我们发现该疾病的临界值足以诱导动力学转变，这是旋转数量的函数。最重要的是，我们认为这种动态相变的同时，非访问学缺乏局部顺序参数。
Short-time dynamics of many-body systems may exhibit non-analytical behavior of the systems' properties at particular times, thus dubbed dynamical quantum phase transition. Simulations showed that in the presence of disorder new critical times appear in the quench evolution of the Ising model. We study the physics behind these new critical times. We discuss the spectral features of the Ising model responsible for the disorder-induced phase transitions. We found the critical value of the disorder sufficient to induce the dynamical phase transition as a function of the number of spins. Most importantly, we argue that this dynamical phase transition while non-topological lacks a local order parameter.
