Skyrmion Ground States of Rapidly Rotating Few-Fermion Systems
arXiv:2005.03172 · doi:10.1088/1367-2630/aba30e
Abstract
We show that ultracold fermions in an artificial magnetic field open up a new window to the physics of the spinful fractional quantum Hall effect. We numerically study the lowest energy states of strongly interacting few-fermion systems in rapidly rotating optical microtraps. We find that skyrmion-like ground states with locally ferromagnetic, long-range spin textures emerge. To realize such states experimentally, rotating microtraps with higher-order angular momentum components may be used to prepare fermionic particles in a lowest Landau level. We find parameter regimes in which skyrmion-like ground states should be accessible in current experiments and demonstrate an adiabatic pathway for their preparation in a rapidly rotating harmonic trap. The addition of long range interactions will lead to an even richer interplay between spin textures and fractional quantum Hall physics.
arXiv comment15 pages, 5 figures
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- Realization of a fractional quantum Hall state with ultracold atoms
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- Artificial versus Natural Atoms: The uncanny capability of the many-body Schrödinger equation to produce emergent behavior