Dissipative Dynamics of Quantum Vortices in Fermionic Superfluid

Barresi, Andrea; Boulet, Antoine; Magierski, Piotr; Wlazłowski, Gabriel

doi:10.1103/physrevlett.130.043001

Cited by 6 publications

(2 citation statements)

References 49 publications

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“…Moreover, the W-SLDA Toolkit has been applied to a variety of problems. Results were documented in papers [26,28,35,[41][42][43][44]. We have also confirmed stability of the results with respect to size of the integration time step dt (all presented here results were obtained with dt = 0.0025e −1 F ).…”

Section: Higgs Mode Decay: (T D < T)supporting

confidence: 82%

Generation and decay of Higgs mode in a strongly interacting Fermi gas

Barresi¹,

Boulet²,

Wlazłowski³

et al. 2023

Preprint

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We investigate the life cycle of the large amplitude Higgs mode in strongly interacting superfluid Fermi gas. Through numerical simulations with time-dependent density-functional theory and the technique of the interaction quench, we verify the previous theoretical predictions on the mode's frequency. Next, we demonstrate that the mode is dynamically unstable against external perturbation and qualitatively examine the emerging state after the mode decays. The post-decay state is characterized by spatial fluctuations of the order parameter and density at scales comparable to the superfluid coherence length scale. We identify similarities with FFLO states, which become more prominent at higher dimensionalities and nonzero spin imbalances.

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Section: Higgs Mode Decay: (T D < T)supporting

confidence: 82%

Generation and decay of Higgs mode in a strongly interacting Fermi gas

Barresi¹,

Boulet²,

Wlazłowski³

et al. 2023

Preprint

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“…Here, we demonstrate yet another attempt to fermionic systems based on density-functional theory in its time-dependent version, which has regard to the thermal fluctuations (for a density-functional theory version valid in a fermionic superfluid phase see Ref. 25 ). It can be viewed as a continuation of our previous studies of thermal fermionic systems 26 , 27 .…”

Section: Introductionmentioning

confidence: 99%

Mechanism for sound dissipation in a two-dimensional degenerate Fermi gas

Gawryluk,

Brewczyk

2024

Sci Rep

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We numerically study the transport properties of a two-dimensional Fermi gas in a weakly and strongly interacting regimes, in the range of temperatures close to the transition to a superfluid phase. For that we excite sound waves in a fermionic mixture by using the phase imprinting technique, follow their evolution, and finally determine both their speed and attenuation. Our formalism, originated from a density-functional theory, incorporates thermal fluctuations via the grand canonical ensemble description and with the help of Metropolis algoritm. From numerical simulations we extract temperature dependence of the sound velocity and diffusivity as well as the dependence on the interaction strength. We emphasize the role of virtual vortex–antivortex pairs creation in the process of sound dissipation.

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