Hysteresis and metastability of Bose-Einstein condensed clouds of atoms confined in ring potentials

Abstract

We consider a Bose-Einstein condensed cloud of atoms which rotate in a toroidal/annular potential. Assuming one-dimensional motion, we evaluate the critical frequencies associated with the effect of hysteresis and the critical coupling for stability of the persistent currents. We perform these calculations using both the mean-field approximation and the method of numerical diagonalization of the many-body Hamiltonian which includes corrections due to the finiteness of the atom number.

7 pages, 5 figures, section on experimental relevance added, final version

References in corpus (5)

• Observation of persistent flow of a Bose-Einstein condensate in a toroidal trap
• Persistent currents in spinor condensates
• Cold atom confinement in an all-optical dark ring trap
• Bose-Einstein condensates in toroidal traps: instabilities, swallow-tail loops, and self-trapping
• Persistent currents in a Bose-Einstein condensate in the presence of disorder

Cited by in corpus (2)

• Rotating Bose-Einstein condensates with a finite number of atoms confined in a ring potential: Spontaneous symmetry breaking, beyond the mean-field approximation
• Parity Symmetry Breaking and Topological Phases in a Superfluid Ring