2007/09/04 by Hui Zhai, Zhai, Hui, Dung-Hai Lee +2
Chemistry · Physics and Astronomy · #Atomic and Subatomic Physics Research #Chemistry #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Electron #FOS: Physical sciences #Fermi Gamma-ray Space Telescope #Fermi gas #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Pairing #Physics #Physics of Superconductivity and Magnetism #Polarization (electrochemistry) #Population #Quantum mechanics #Spin (aerodynamics) #Superconductivity #Superconductivity (cond-mat.supr-con) #Superfluidity #cond-mat.mes-hall #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.0709.0388
4 pages, 3 figures
arxiv created 2007/09/04 · openalex publication_date 2007/09/04 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Motivated by recent experiments in trapped Fermi gas with spin population imbalance, we discuss the effects of the quantum and thermal fluctuations of the interface between a fully paired superfluid core and a fully polarized Fermi gas. We demonstrate that even if there is no true partially polarized thermodynamic phase in bulk, the interface fluctuation can give rise to a partially polarized transition regime in trap. Our theory yields a definite prediction for the functional forms of the spatial profile of spin polarization and pairing gap, and we show that the spin-resolved density profiles measured by both the MIT and Rice groups obey this function form. We also show that sufficient large fluctuation will lead to a visibly unequal density even at the center of the cloud. We hope this picture can shed lights on the controversial discrepancies in recent experiments.