Exact calculation of the skyrmion lifetime in a ferromagnetic Bose condensate

Details Exact calculation of the skyrmion lifetime in a ferromagnetic Bose condensate Exact calculation of the skyrmion lifetime in a ferromagnetic Bose condensate

2002-08-30

arxiv.org/abs/cond-mat/0208593v1

Phys.Rev. A66 (2002) 043622

Physics

Condensed Matter

Soft Condensed Matter

16 pages, 4 figures, to appear Phys. Rev. A

Scientific paper

10.1103/PhysRevA.66.043622

The tunneling rate of a skyrmion in ferromagnetic spin-1/2 Bose condensates through an off-centered potential barrier is calculated exactly with the periodic instanton method. The prefactor is shown to depend on the chemical potential of the core atoms, at which level the atom tunnels. Our results can be readily extended to estimate the lifetime of other topological excitations in the condensate, such as vortices and monopoles.

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