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Article overview
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Finite-Momentum Dimer Bound State in Spin-Orbit Coupled Fermi Gas | Lin Dong
; Lei Jiang
; Hui Hu
; Han Pu
; | Date: |
7 Nov 2012 | Abstract: | We investigate the two-body properties of a spin-1/2 Fermi gas subject to a
spin-orbit coupling induced by laser fields. When attractive s-wave interaction
between unlike spins is present, the system may form a dimer bound state.
Surprisingly, under proper conditions, the bound state obtains finite
center-of-mass momentum, whereas under the same condition but in the absence of
the two-body interaction, the system has zero total momentum. This unusual
result can be regarded as a consequence of the broken Galilean invariance by
the spin-orbit coupling. Such a finite-momentum bound state will have profound
effects on the many-body properties of the system. | Source: | arXiv, 1211.1700 | Services: | Forum | Review | PDF | Favorites |
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