Periodic dynamics of population-imbalanced fermionic condensates in optical lattices

We investigate the dynamics of a population-imbalanced two-species fermionic system trapped in an optical lattice. The paired fermions here can form bosonic molecules via Feshbach coupling in the presence of an external magnetic field. It is shown that the natural fluctuations of the condensate frac...

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Bibliographic Details
Published in:The European physical journal. B, Condensed matter physics Condensed matter physics, 2024-02, Vol.97 (2), Article 15
Main Authors: Mukherjee, Avinaba, Dasgupta, Raka
Format: Article
Language:English
Subjects:
Complex Systems
Condensates
Condensed Matter Physics
Coupling (molecular)
Fermions
Fluid- and Aerodynamics
Optical lattices
Physics
Physics and Astronomy
Regular Article - Solid State and Materials
Solid State Physics
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Summary:We investigate the dynamics of a population-imbalanced two-species fermionic system trapped in an optical lattice. The paired fermions here can form bosonic molecules via Feshbach coupling in the presence of an external magnetic field. It is shown that the natural fluctuations of the condensate fraction are periodic beyond a threshold Feshbach detuning; below this threshold value, the condensate fraction shows no oscillation at all. The oscillation frequency vs. detuning curve is linear in nature. The slope and intercept of this line are shown to carry important information about the amount of imbalance present in the system, and the momentum-space structure of the exotic phases. Graphical abstract
ISSN:1434-6028
1434-6036
DOI:10.1140/epjb/s10051-024-00649-9