Finite-Temperature Fluid-Insulator Transition of Strongly Interacting 1D Disordered Bosons

TL;DR

This paper investigates the finite-temperature phase transitions in strongly interacting disordered 1D bosonic systems, revealing two insulator-fluid transitions as interaction strength varies, including reentrant behavior.

Contribution

It provides a comprehensive analysis of the many-body localization-delocalization transition at finite temperature in 1D disordered bosons, highlighting the reentrant insulator phase.

Findings

Two insulator-fluid transitions at finite temperature

Reentrant insulator phase at large interactions

Interaction strength controls phase transitions

Abstract

We consider the many-body localization-delocalization transition for strongly interacting one- dimensional disordered bosons and construct the full picture of finite temperature behavior of this system. This picture shows two insulator-fluid transitions at any finite temperature when varying the interaction strength. At weak interactions an increase in the interaction strength leads to insulator->fluid transition, and for large interactions one has a reentrance to the insulator regime.