Magnetic properties of commensurate Bose-Bose mixtures in one-dimensional optical lattices

TL;DR

This paper studies the magnetic phases of strongly interacting Bose-Bose mixtures in one-dimensional optical lattices, providing theoretical predictions and experimental guidance for observing different magnetic states.

Contribution

It combines analytical and numerical methods to map out the ground state phase diagram of Bose-Bose mixtures, highlighting accessible regimes for experimental realization.

Findings

Quantitative phase diagrams for Rb-K mixtures

Identification of favorable regimes for magnetic phases

Discussion on finite temperature effects on observability

Abstract

We investigate magnetic properties of strongly interacting bosonic mixtures confined in one dimensional geometries, focusing on recently realized Rb-K gases with tunable interspecies interactions. By combining analytical perturbation theory results with density-matrix-renormalization group calculations, we provide quantitative estimates of the ground state phase diagram as a function of the relevant microscopic quantities, identifying the more favorable experimental regimes in order to access the various magnetic phases. Finally, we qualitatively discuss the observability of such phases in realistic setups when finite temperature effects have to be considered.