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Article

Rabi Coupled Fermions in the BCS–BEC Crossover

by
Luca Dell’Anna
1,2,*,
Federico De Bettin
1 and
Luca Salasnich
1,2,3
1
Dipartimento di Fisica e Astronomia “G. Galilei” and QTech Center, Università di Padova, Via Marzolo 8, 35131 Padova, Italy
2
Istituto Nazionale di Fisica Nucleare, Sezione di Padova, Via Marzolo 8, 35131 Padova, Italy
3
Istituto Nazionale di Ottica del Consiglio Nazionale delle Ricerche, Via Nello Carrara 2, 50019 Sesto Fiorentino, Italy
*
Author to whom correspondence should be addressed.
Condens. Matter 2022, 7(4), 59; https://doi.org/10.3390/condmat7040059
Submission received: 14 September 2022 / Revised: 16 October 2022 / Accepted: 18 October 2022 / Published: 22 October 2022
(This article belongs to the Special Issue SuperFluctuations, 6th Edition)

Abstract

We investigate the three-dimensional BCS–BEC crossover in the presence of a Rabi coupling, which strongly affects several properties of the system, such as the chemical potential, the pairing gap and the superfluid density. We determine the critical interaction strength, below which the system is normal also at zero temperature. Finally, we calculate the effect of the Rabi coupling on the critical temperature of the superfluid-to-normal phase transition by using different theoretical schemes.
Keywords: BCS–BEC crossover; superfluidity; critical temperature BCS–BEC crossover; superfluidity; critical temperature

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MDPI and ACS Style

Dell’Anna, L.; De Bettin, F.; Salasnich, L. Rabi Coupled Fermions in the BCS–BEC Crossover. Condens. Matter 2022, 7, 59. https://doi.org/10.3390/condmat7040059

AMA Style

Dell’Anna L, De Bettin F, Salasnich L. Rabi Coupled Fermions in the BCS–BEC Crossover. Condensed Matter. 2022; 7(4):59. https://doi.org/10.3390/condmat7040059

Chicago/Turabian Style

Dell’Anna, Luca, Federico De Bettin, and Luca Salasnich. 2022. "Rabi Coupled Fermions in the BCS–BEC Crossover" Condensed Matter 7, no. 4: 59. https://doi.org/10.3390/condmat7040059

APA Style

Dell’Anna, L., De Bettin, F., & Salasnich, L. (2022). Rabi Coupled Fermions in the BCS–BEC Crossover. Condensed Matter, 7(4), 59. https://doi.org/10.3390/condmat7040059

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