The Role of Interaction in the Pairing of Two Spin-orbit Coupled Fermions
| Autor: | Ye, Chong, Liu, Jie, Fu, Li-Bin |
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| Rok vydání: | 2016 |
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| Druh dokumentu: | Working Paper |
| Popis: | We investigate the role of a repulsive s-wave interaction in the two-body problem in the presence of spin orbit couplings, motivated by current interests in exploring exotic superfluid phases in spin-orbit coupled Fermi gases. For weak spin orbit coupling where the density of states is not significantly altered, we analytically show that the high-energy states become more important in determining the binding energy when the interaction strength decreases. Consequently, tuning the interaction gives rise to a rich ground state behavior, including a zigzag of the ground state momentum or inducing transitions among the meta-stable states. By exactly solving the two-body problem for a spin-orbit coupled Fermi mixture, we demonstrate that our analysis can also apply to the case when the density of states is significantly modified by the spin-orbit coupling. Our findings pave the way for understanding and controlling the paring of fermions in the presence of spin orbit couplings. Comment: 5 pages, 3 figures |
| Databáze: | arXiv |
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