Many-body localized phase of bosonic dipoles in a tilted optical lattice

TL;DR

This paper investigates the many-body localized phase in a 1D constrained dipole boson model with an Aubry-Andre potential, identifying signatures of the ergodic-MBL transition through quantum dynamics and proposing experimental tests.

Contribution

It provides the first detailed phase diagram and dynamical signatures of MBL in a bosonic dipole system with tunable potential, linking theory with experimental feasibility.

Findings

Identification of a tunable ergodic-MBL transition

Distinct dynamical signatures of MBL and ergodic phases

Estimation of experimental timescales for observing MBL

Abstract

We chart out the ground state phase diagram and demonstrate the presence of a many-body localized (MBL) phase for an experimentally realizable one-dimensional (1D) constrained dipole boson model in the presence of an Aubry-Andre (AA) potential whose strength $\lambda_0$ can be tuned to precipitate an ergodic-MBL transition. We discuss the signature of such a transition in the quantum dynamics of the model by computing its response subsequent to a sudden quench of $\lambda_0$. We show that the MBL and the ergodic phases can be clearly distinguished by study of post-quench dynamics and provide an estimate for minimal time up to which experiments need to track the response of the system to confirm the onset of the MBL phase. We suggest experiments which can test our theory.