Mean-field yrast spectrum and persistent currents in a two-component Bose gas with interaction asymmetry

Abstract

We analyze the mean-field yrast spectrum of a two-component Bose gas in the ring geometry with arbitrary interaction asymmetry. Of particular interest is the possibility that the yrast spectrum develops local minima at which persistent superfluid flow can occur. By analyzing the mean-field energy functional, we show that local minima can be found at plane-wave states and arise when the system parameters satisfy certain inequalities. We then go on to show that these plane-wave states can be yrast states even when the yrast spectrum no longer exhibits a local minimum. Finally, we obtain conditions which establish when the plane-wave states cease to be yrast states. Specific examples illustrating the roles played by the various interaction asymmetries are presented.

Final version, one revised figure, to appear in Phys. Rev. A

References in corpus (5)

• Observation of persistent flow of a Bose-Einstein condensate in a toroidal trap
• Persistent currents in spinor condensates
• Critical Rotation of an Annular Superfluid Bose Gas
• Vortices in a toroidal Bose-Einstein condensate with a rotating weak link
• Persistent currents in a two-component Bose-Einstein condensate confined in a ring potential

Cited by in corpus (6)

• Numerical solution of the stationary multicomponent nonlinear Schrödinger equation with a constraint on the angular momentum
• Excitation spectrum of a mixture of two Bose gases confined in a ring potential with interaction asymmetry
• Persistent currents in coherently coupled Bose-Einstein condensates in a ring trap
• Spin-orbit-coupled spin-1 Bose-Einstein condensates in a toroidal trap: even-petal-number necklacelike state and persistent flow
• Persistent Currents in Ferromagnetic Condensates
• Rotational properties of superfluid Fermi-Bose mixtures in a tight toroidal trap