Effects of three-body scattering processes on BCS-BEC crossover
Quantum Gases
2011-10-18 v1 Superconductivity
Abstract
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.
Cite
@article{arxiv.1110.3417,
title = {Effects of three-body scattering processes on BCS-BEC crossover},
author = {Raka Dasgupta},
journal= {arXiv preprint arXiv:1110.3417},
year = {2011}
}