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Effects of three-body scattering processes on BCS-BEC crossover
Published in
Volume: 82
Issue: 6
We investigate the BCS-BEC crossover taking into account an additional three-body interaction, which is essentially the scattering between the Cooper pairs and the newly formed bosons. We show that if the two-body interaction is attractive, the presence of this additional three-body term makes the crossover process a nonreversible one. Starting from a stable Bose-Einstein condensate (BEC) state, crossover to BCS can be achieved; but if the BCS state is the starting point, instead of a stable BEC region, what the system crosses over to is a metastable condensed state. © 2010 The American Physical Society.
About the journal
JournalPhysical Review A - Atomic, Molecular, and Optical Physics