Journal
CHINESE PHYSICS B
Volume 30, Issue 10, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1674-1056/abf346
Keywords
FFLO state; optical lattice; ultracold Fermi gas; superfluid
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Funding
- Beijing Natural Science Foundation, China [Z180013]
- National Natural Science Foundation of China [11522436, 11774425, 12074428]
- National Key R&D Program of China [2018YFA0306501]
- Research Funds of Renmin University of China [16XNLQ03, 18XNLQ15]
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We investigated the possibility of stabilizing an FFLO state in a two-component Fermi gas trapped in a moving two-dimensional optical lattice, finding that a finite pairing momentum can be induced perpendicular to the moving direction for nearly half filling, leading to a tilt of the total pairing momentum towards the nesting vector for an enhancement of the density of states.
We study the possibility of stabilizing a Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state in an equally populated two-component Fermi gas trapped in a moving two-dimensional optical lattice. For a system with nearly half filling, we find that a finite pairing momentum perpendicular to the moving direction can be spontaneously induced for a proper choice of lattice velocity. As a result, the total pairing momentum is tilted towards the nesting vector to take advantage of the significant enhancement of the density of states.
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