Stability of coreless vortices in ferromagnetic spinor Bose-Einstein condensates

Journal Article · Wed Aug 15 04:00:00 EDT 2007 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.76.023610· OSTI ID:21016018

Pietilae, V; Virtanen, S M. M. ^[1]; Moettoenen, M ^[1]

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1. Laboratory of Physics, Helsinki University of Technology, P. O. Box 4100, FI-02015 TKK (Finland)

We study the energetic and dynamic stability of coreless vortices in nonrotated spin-1 Bose-Einstein condensates, trapped with a three-dimensional optical potential and a Ioffe-Pritchard field. The stability of stationary vortex states is investigated by solving the corresponding Bogoliubov equations. We show that the quasiparticle excitations corresponding to axisymmetric stationary states can be taken to be eigenstates of angular momentum in the axial direction. Our results show that coreless vortex states can occur as local or global minima of the condensate energy or become energetically or dynamically unstable depending on the parameters of the Ioffe-Pritchard field. The experimentally most relevant coreless vortex state containing a doubly quantized vortex in one of the hyperfine spin components turned out to have very nontrivial stability regions, and especially a quasiperiodic dynamic instability region which corresponds to splitting of the doubly quantized vortex.

• OSTI ID: 21016018
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 76; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AXIAL SYMMETRY
BOGOLYUBOV METHOD
BOSE-EINSTEIN CONDENSATION
EIGENFUNCTIONS
EIGENSTATES
EIGENVALUES
EQUATIONS
EXCITATION
FERROMAGNETISM
INSTABILITY
SPIN
SPINORS
STABILITY
THREE-DIMENSIONAL CALCULATIONS
TRAPPING
VORTICES