BCS-BEC crossover and quantum phase transition in an ultracold Fermi gas under spin-orbit coupling

@article{Wu2014BCSBECCA,
  title={BCS-BEC crossover and quantum phase transition in an ultracold Fermi gas under spin-orbit coupling},
  author={Fan Wu and Ren-jie Zhang and Tianshu Deng and Wei Zhang and Wei Yi and Guangcan Guo},
  journal={Physical Review A},
  year={2014},
  volume={89},
  pages={063610}
}
In this work, we study the BCS-BEC crossover and quantum phase transition in a Fermi gas under Rashba spin-orbit coupling close to a Feshbach resonance. By adopting a two-channel model, we take into account of the closed channel molecules, and show that combined with spin-orbit coupling, a finite background scattering in the open channel can lead to two branches of solution for both the two-body and the many-body ground states. The branching of the two-body bound state solution originates from… 
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