论文标题
观察动态量子相的转换
Observing Dynamical Quantum Phase Transitions through Quasilocal String Operators
论文作者
论文摘要
我们分析了物理可观察物中动态量子相变的特征。特别是，我们表明，有限长度产品或字符串操作员的期望值和各种按时间顺序相关函数在淬火协议之后会产生尖齿奇点，随着字符串长度的增加，它们会变得更加锐利。我们说明了我们的想法，分析了可集成和不可整合的一维iSing模型，以表明这些过渡对模型的细节以及对初始状态的选择都是可靠的。
We analyze signatures of the dynamical quantum phase transitions in physical observables. In particular, we show that both the expectation value and various out of time order correlation functions of the finite length product or string operators develop cusp singularities following quench protocols, which become sharper and sharper as the string length increases. We illustrated our ideas analyzing both integrable and nonintegrable one-dimensional Ising models showing that these transitions are robust both to the details of the model and to the choice of the initial state.
