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Fermion-Mediated BCS-BEC Crossover in UltracoldK<mml:mprescripts/><mml:none/>40Gases

2004/09/30 by Meera M. Parish, M. M. Parish, Bogdan Mihaila +4 · 11 citations
Physics and Astronomy · #Atomic physics #BCS theory #Cold Atom Physics and Bose-Einstein Condensates #Fermi Gamma-ray Space Telescope #Fermion #Feshbach resonance #Hyperfine structure #Molecule #Pairing #Pauli exclusion principle #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Quantum, superfluid, helium dynamics #Superconductivity #Ultracold atom #Wave function #cond-mat.other #hep-ph #nucl-th

paper · pdf · doi:10.1103/physrevlett.94.240402

published in Physical Review Letters 94(24) (American Physical Society) · References added, Fig.1 revised, and Fig.3 removed

openalex publication_date 2005/06/21 · arxiv created 2005/06/30 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Studies of Feshbach resonance phenomena in fermionic alkali gases have drawn heavily on the intuition afforded by a Fermi-Bose theory which presents the Feshbach molecule as a featureless Bose particle. While this model may provide a suitable platform to explore the 6Li system, we argue that its application to 40K, where the hyperfine structure is inverted, is inappropriate. Introducing a three-state Fermi model, where a spin state is shared by the open and closed channel states, we show that effects of ``Pauli blocking'' appear in the internal structure of the condensate wave function.

Citations