Publication: Ultracold fermions in real or fictitious magnetic fields: BCS-BEC evolution and type-I–type-II transition
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Program
KU-Authors
KU Authors
Co-Authors
de Melo, C. A. R. Sa
Advisor
Publication Date
2011
Language
English
Type
Journal Article
Journal Title
Journal ISSN
Volume Title
Abstract
We study ultracold neutral fermion superfluids in the presence of fictitious magnetic fields, as well as charged fermion superfluids in the presence of real magnetic fields. Charged fermion superfluids undergo a phase transition from type-I to type-II superfluidity, where the magnetic properties of the superfluid change from being a perfect diamagnet without vortices to a partial diamagnet with the emergence of the Abrikosov vortex lattice. The transition from type-I to type-II superfluidity is tuned by changing the scattering parameter (interaction) for fixed density. We also find that neutral fermion superfluids such as 6Li and 40K are extreme type-II superfluids and are more robust to the penetration of a fictitious magnetic field in the BCS-BEC crossover region near unitarity, where the critical fictitious magnetic field reaches a maximum as a function of the scattering parameter (interaction).
Description
Source:
Physical Review A
Publisher:
American Physical Society (APS)
Keywords:
Subject
Optics, Physics