Goldstone-mode Instability leading to Fragmentation in a Spinor Bose-Einstein Condensate
arXiv:1310.6989 · doi:10.1103/PhysRevA.89.033627
Abstract
We apply the number-conserving Bogoliubov theory to spinor Bose-Einstein condensates and show that the Goldstone magnon leads instability leading to fragmentation. Unlike the dynamical instability, where modes with complex eigenfrequencies grow exponentially, here the zero-energy mode exhibits algebraic growth. We also point out that a small fraction of thermally excited atoms enhances the fragmentation dynamics.
6 pages, 1 firgure
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- Dynamical Instability Induced by Zero Mode Under Symmetry Breaking External Perturbation
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