Strong Fulde-Ferrell Larkin-Ovchinnikov pairing fluctuations in polarized Fermi systems

被引：1
|
作者：
Pini, Michele [1 ,2 ]
Pieri, Pierbiagio [3 ,4 ]
Strinati, Giancarlo Calvanese [1 ,5 ,6 ]
机构：
[1] Univ Camerino, Sch Sci & Technol, Phys Div, I-62032 Carnerino, MC, Italy
[2] Ist Nazl Ottica, Sede Sesto Fiorentino, CNR INO, I-50019 Sesto Fiorentino, FI, Italy
[3] Univ Bologna, Dipartimento Fis & Astron, I-40127 Bologna, BO, Italy
[4] Ist Nazl Fis Nucl, Sez Bologna, I-40127 Bologna, BO, Italy
[5] Ist Nazl Fis Nucl, Sez Perugia, I-06123 Perugia, PG, Italy
[6] Ist Nazl Ottica, CNR INO, Sede Firenze, I-50125 Florence, FI, Italy
来源：
PHYSICAL REVIEW RESEARCH | 2021年 / 3卷 / 04期
关键词：
BCS SUPERCONDUCTIVITY; DENSITY-WAVE; BOSE-CONDENSATION; PHASE-DIAGRAM; TRANSITION; EVOLUTION; STATE; GAS;
D O I：
10.1103/PhysRevResearch.3.043068
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We calculate the pair susceptibility of an attractive spin-polarized Fermi gas in the normal phase, as a function of the pair momentum. Close to unitarity, we find a strong enhancement of Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) pairing fluctuations over an extended region of the temperature-polarization phase diagram, which manifests itself as a pronounced peak in the pair-momentum distribution at a finite pair momentum. This peak should be amenable to experimental observation at achievable temperatures in a boxlike trapping potential, as a fingerprint of FFLO pairing. Our calculations rest on a self-consistent t-matrix approach which, for the unitary balanced Fermi gas, has been validated against experimental data for several thermodynamic quantities.
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页数：10
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