Finite-temperature phases of trapped bosons in a two-dimensional quasiperiodic potential

Abstract

We study a system of 2D trapped bosons in a quasiperiodic potential at finite temperature, via ab initio Path Integral Monte Carlo simulations. Alongside the superfluid, normal fluid and insulating phases, we demonstrate the existence of a Bose glass phase, which is found to be robust to thermal fluctuations, up to about half of the critical temperature of the non-interacting system. Local quantities in the trap are characterized by employing zonal estimators, allowing us to trace a phase diagram; we do so for a set of parameters within reach of current experiments with quasi-2D optical confinement.