Bosons in a toroidal trap: Ground state and vortices

1999/01/13 by Luca Salasnich, L. Salasnich, Alberto Parola +2 · 2 citations
Physics and Astronomy · #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #Quantum, superfluid, helium dynamics #cond-mat

paper · pdf · doi:10.1103/physreva.59.2990

published as Phys. Rev. A 59 (1999) 2990-2995 · 15 pages + 4 figures, to be published in Phys. Rev. A

arxiv created 1999/01/13 · openalex publication_date 1999/04/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We study the Bose-Einstein condensate (BEC) in a three-dimensional toroidal sombrero-shaped trap. By changing the parameters of the potential, or the number of bosons, it is possible to modify strongly the density profile of the BEC. We consider the ground-state properties for positive and negative scattering length and calculate the spectrum elementary excitations. We also discuss the macroscopic phase coherence and superfluidity of the BEC by analyzing vortex states and their stability.

Citations

• Bosons in anisotropic traps: Ground state and vortices
• Structure and stability of bosonic clouds: Alkali-metal atoms with negative scattering length
• Structure of a quantized vortex in boson systems

Cited by

• Acceleration and localization of matter in a ring trap
• Superfluid toroidal currents in atomic condensates