Fragmentation of Spin-orbit Coupled Spinor Bose-Einstein Condensates

Abstract

The fragmentation of spin-orbit coupled spin-1 Bose gas with a weak interaction in external harmonic trap is explored by both exact diagonalization and mean-field theory. This fragmentation tendency, which originates from the total angular momentum conservation, is affected obviously by the spin-orbit coupling strength and the spin-dependent interaction. Strong spin-orbit interaction raises the inverse participation ratio, which describes the number of significantly occupied single-particle states. As the spin-dependent interaction changes from anti-ferromagnetic to ferromagnetic, the peak values in the inverse participation ratio become lower. Without the confinement of the appointed total angular momentum, the condensate chooses a zero or finite total angular momentum ground state, which is determined by both the interaction and the spin-orbit coupling strength.

7pages,8figures

References in corpus (5)

• Spin-Injection Spectroscopy of a Spin-Orbit Coupled Fermi Gas
• A Bose-Einstein Condensate in a Uniform Light-induced Vector Potential
• Generalized Rashba spin-orbit coupling for cold atoms
• Fragmented many-body ground states for scalar bosons in a single trap
• Ground State Properties of Spin-Orbit Coupled Bose Gases for Arbitrary Interactions

Cited by in corpus (5)

• Localized modes in quasi-2D Bose-Einstein condensates with spin-orbit and Rabi couplings
• Phase separation in a spin-orbit coupled Bose-Einstein condensate
• Spin-orbit-coupled Bose-Einstein condensates held under toroidal trap
• Breaking the resilience of a two-dimensional Bose-Einstein condensate to fragmentation
• Spontaneous symmetry breaking in a spin-orbit coupled $f=2$ spinor condensate