Dynamical creation of a supersolid in asymmetric mixtures of bosons

TL;DR

This paper proposes a method to dynamically generate a supersolid state in an optical lattice using an attractive, mass-imbalanced bosonic mixture, leading to simultaneous superfluidity and solid order in a one-dimensional system.

Contribution

It introduces a novel scheme to create supersolidity dynamically in a one-dimensional optical lattice with mass-imbalanced bosons, without doping.

Findings

Supersolidity arises as an out-of-equilibrium state from molecular quantum crystals.

Both bosonic species exhibit quasi-condensation and long-range order simultaneously.

The proposed model is experimentally feasible with current bosonic mixture setups.

Abstract

We propose a scheme to dynamically create a supersolid state in an optical lattice, using an attractive mixture of mass-imbalanced bosons. Starting from a "molecular" quantum crystal, supersolidity is induced dynamically as an out-of-equilibrium state. When neighboring molecular wavefunctions overlap, both bosonic species simultaneously exhibit quasi-condensation and long-range solid order, which is stabilized by their mass imbalance. Supersolidity appears in a perfect one-dimensional crystal, without the requirement of doping. Our model can be realized in present experiments with bosonic mixtures that feature simple on-site interactions, clearing the path to the observation of supersolidity.