Out-of-Time-Ordered Correlation in Anisotropic Dicke Model

TL;DR

This paper demonstrates that zero-temperature out-of-time-ordered correlation functions can effectively detect quantum phase transitions in the anisotropic Dicke model, providing insights into quantum chaos and phase diagram characterization.

Contribution

It introduces the use of OTOC to identify quantum phase transitions in the anisotropic Dicke model, including finite-size and temperature effects.

Findings

OTOC detects quantum phase transition in the anisotropic Dicke model

Phase diagram constructed using OTOC

Finite-size and temperature effects analyzed

Abstract

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 computationally demonstrate that zerotemperature OTOC can detect quantum phase transition in anisotropic Dicke model. Phase diagram is given with OTOC. Finite-size effect is studied. Finally, temperature effect is discussed.