Reversal of the circulation of a vortex by quantum tunneling in trapped Bose systems

Details Reversal of the circulation of a vortex by quantum tunneling in trapped Bose systems Reversal of the circulation of a vortex by quantum tunneling in trapped Bose systems

2007-01-12

arxiv.org/abs/cond-mat/0701270v3

Phys. Rev. A 76, 021605(R) (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 5 figures; published in Phys. Rev. A, Rapid Communications

Scientific paper

10.1103/PhysRevA.76.021605

We study the quantum dynamics of a model for a vortex in a Bose gas with repulsive interactions in an anisotropic, harmonic trap. By solving the Schr\"odinger equation numerically, we show that the circulation of the vortex can undergo periodic reversals by quantum-mechanical tunneling. With increasing interaction strength or particle number, vortices become increasingly stable, and the period for reversals increases. Tunneling between vortex and antivortex states is shown to be described to a good approximation by a superposition of vortex and antivortex states (a Schr\"odinger cat state), rather than the mean-field state, and we derive an analytical expression for the oscillation period. The problem is shown to be equivalent to that of the two-site Bose Hubbard model with attractive interactions.

Affiliated with

Also associated with

No associations

Rating

Reversal of the circulation of a vortex by quantum tunneling in trapped Bose systems does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Reversal of the circulation of a vortex by quantum tunneling in trapped Bose systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reversal of the circulation of a vortex by quantum tunneling in trapped Bose systems will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-218072