Out-of-time-ordered correlation in the anisotropic Dicke model

Out-of-time-ordered correlation (OTOC) functions have been used as an indicator of quantum chaos in a lot of physical systems. In this work, we numerically demonstrate that zero temperature OTOC can detect quantum phase transition in the anisotropic Dicke model. The phase diagram is given with OTOC. The finite-size effect is studied. Finally, the temperature effect is discussed.

Automated summary

In this study, it is numerically demonstrated that zero temperature OTOC can be used to detect quantum phase transition in the anisotropic Dicke model. The phase diagram is provided based on OTOC, with further investigation on finite-size and temperature effects.