Journal
PHYSICAL REVIEW A
Volume 89, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.89.033627
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Funding
- MEXT of Japan [22340114, 22740265]
- Inoue Foundation for Science
- Funding Program for World-Leading Innovation R & D on Science and Technology (FIRST)
- Grants-in-Aid for Scientific Research [22340114, 22740265] Funding Source: KAKEN
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We apply the number-conserving Bogoliubov theory to spinor Bose-Einstein condensates and show that the Goldstone magnon causes 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.
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