Persistent currents in a strongly interacting multicomponent Bose gas on a ring

Abstract

We consider a two-component Bose-Bose mixture at strong repulsive interactions in a tightly confining, one-dimensional ring trap and subjected to an artificial gauge field. By employing the Bethe Ansatz exact solution for the many-body wavefunction, we obtain the ground state energy and the persistent currents. For each value of the applied flux, we then determine the symmetry of the state under particles exchange. We find that the ground-state energy and the persistent currents display a reduced periodicity with respect to the case of non-interacting particles, corresponding to reaching states with fractional angular momentum per particle. We relate this effect to the change of symmetry of the ground state under the effect of the artificial gauge field. Our results generalize the ones previously reported for fermionic mixtures with both attractive and repulsive interactions and highlight the role of symmetry in this effect

12 pages, 2 figures, 3 tables

References in corpus (8)

• Many-Body Physics with Ultracold Gases
• Quench-induced supercurrents in an annular Bose gas
• Interferometric measurement of the current-phase relationship of a superfluid weak link
• Imprinting persistent currents in tunable fermionic rings
• High-momentum tails as magnetic structure probes for strongly-correlated $SU(\kappa )$ fermionic mixtures in one-dimensional traps
• Quantum rings for beginners II: Bosons versus fermions
• Persistent currents in one dimension: the other side of Leggett's theorem
• Singular Solutions to the Bethe Ansatz Equations and Rigged Configurations

Cited by in corpus (4)

• Perspective on new implementations of atomtronic circuits
• Theoretical description of atomtronic Josephson junctions in an optical lattice
• Static impurity in a mesoscopic system of SU($N$) fermionic matter-waves
• Necklace Ansatz for strongly repulsive spin mixtures on a ring