| Fulde–Ferrell–Larkin–Ovchinnikov states in equally populated Fermi gases in a two-dimensional moving optical lattice |
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| 作者单位： | 1.Department of Physics, Renmin University of China, Beijing 100872, China;2.School of Physics, Xi'an Jiaotong University, Xi'an 710049, China;3.Beijing Key Laboratory of Opto-electronic Functional Materials and Micro-nano Devices, Renmin University of China, Beijing 100872, China |
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| 基金项目： | Project supported by the Beijing Natural Science Foundation, China (Grant No. Z180013), the National Natural Science Foundation of China (Grant Nos. 11522436, 11774425, and 12074428), the National Key R&D Program of China (Grant No. 2018YFA0306501), and the Research Funds of Renmin University of China (Grant Nos. 16XNLQ03 and 18XNLQ15). |
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| 摘 要： | 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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| 收稿时间： | 2021-03-03 |
Fulde-Ferrell-Larkin-Ovchinnikov states in equally populated Fermi gases in a two-dimensional moving optical lattice |
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| Affiliation: | 1.Department of Physics, Renmin University of China, Beijing 100872, China;2.School of Physics, Xi'an Jiaotong University, Xi'an 710049, China;3.Beijing Key Laboratory of Opto-electronic Functional Materials and Micro-nano Devices, Renmin University of China, Beijing 100872, China |
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| Abstract: | 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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| Keywords: | FFLO state optical lattice ultracold Fermi gas superfluid |
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