Finite-temperature phases of trapped bosons in a two-dimensional quasiperiodic potential
Matteo Ciardi, Tommaso Macrì, Fabio Cinti
Abstract
We study a system of 2D trapped bosons in a quasiperiodic potential via ab initio path integral Monte Carlo simulations, focusing on its finite-temperature properties, which have not yet been explored. 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 noninteracting 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.
Topics & Concepts
Quasiperiodic functionBosonPhysicsPhase diagramThermal fluctuationsSuperfluidityMonte Carlo methodPath integral Monte CarloCondensed matter physicsStatistical physicsEstimatorPhase (matter)Path integral formulationQuantum mechanicsQuantumMathematicsStatisticsQuantum many-body systemsCold Atom Physics and Bose-Einstein CondensatesQuantum, superfluid, helium dynamics