Unconventional quantum phases of lattice bosonic mixtures

TL;DR

This paper explores novel quantum phases in strongly interacting one-dimensional lattice bosonic mixtures, highlighting metastable states and their experimental signatures, especially in the context of increasing interspecies repulsion.

Contribution

It introduces the concept of quantum emulsion metastable states in lattice bosonic mixtures and analyzes their properties using a mean-field approach, revealing new disordered phases.

Findings

Identification of quantum emulsion metastable states at high interspecies interaction

Decreased visibility in time-of-flight images for disordered states

Insights into the dynamics preventing the system from reaching the true ground state

Abstract

We consider strongly interacting boson-boson mixtures on one-dimensional lattices and, by adopting a qualitative mean-field approach, investigate their quantum phases as the interspecies repulsion is increased. In particular, we analyze the low-energy "quantum emulsion" metastable states occurring at large values of the interspecies interaction, which are expected to prevent the system from reaching its true ground state. We argue a significant decrease in the visibility of the time-of-flight images in the case of these spontaneously disordered states.