Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Theoretical and Mathematical Physics

Collective excitations of finite fermi systems in the region of a phase transition

V.V. Mazepus

Published Mar 1, 1975• 5 citations
Publisher
DOI
10.1007/bf01037805

Related papers

Self-consistent collective excitation in critical region of second order phase transitions

Koichiro Matsuno, Eugene Stanley

Physics Letters A•Dec 1, 1970•4 citations

Fluctuations in transitional regions of finite Fermi systems

W. D. Heiss, A. A. Kotz�

The European Physical Journal A•Sep 1, 1988•0 citations

Two-body contribution to the relaxation of collective excitations in cold finite Fermi systems

V. M. Kolomietz, S. V. Lukyanov, V.A. Plujko +1 more

Physics of Atomic Nuclei•Jan 1, 1999•0 citations

Collective excitations in fermi systems

Viktor Mikhaĭlovich Galit︠s︡kiĭ

Physica•Dec 1, 1960•3 citations

Finite-Temperature Collective Dynamics of a Fermi Gas in the BEC-BCS Crossover

Matthew J. Wright, S. Riedl, A. Altmeyer +4 more

We report on experimental studies on the collective behavior of a strongly interacting Fermi gas with tunable interactions and variable temperature. A scissors mode excitation in an elliptical trap is used to characterize the dynamics of the quantum gas in terms of hydrodynamic or near-collisionless behavior. We obtain a crossover phase diagram for collisional properties, showing a large region where a nonsuperfluid strongly interacting gas shows hydrodynamic behavior. In a narrow interaction regime on the BCS side of the crossover, we find a novel temperature-dependent damping peak, suggesting a relation to the superfluid phase transition.

arXiv:0707.3593•Physical Review Letters•Oct 12, 2007•90 citations

Collective excitations of a trapped Fermi gas at finite temperature

Anna Korolyuk, J. J. Kinnunen, Päivi Törmä

We study collective excitations of a trapped Fermi gas at finite temperature using the Bogoliubov--de Gennes mean-field theory in conjunction with the generalized random-phase approximation. The collective excitations are analyzed through the density response of a monopole excitation. We show the appearance of several modes at the normal-fluid--superfluid phase-transition temperature: Higgs mode--like pairing amplitude modulations, analogues of the second sound in the trapped gas, and an edge mode that is also the strongest mode in the response.

arXiv:1307.1294•Physical Review A•Jan 6, 2014•19 citations
We report on experimental studies on the collective behavior of a strongly interacting Fermi gas with tunable interactions and variable temperature. A scissors mode excitation in an elliptical trap is used to characterize the dynamics of the quantum gas in terms of hydrodynamic or near-collisionless behavior. We obtain a crossover phase diagram for collisional properties, showing a large region where a nonsuperfluid strongly interacting gas shows hydrodynamic behavior. In a narrow interaction regime on the BCS side of the crossover, we find a novel temperature-dependent damping peak, suggesting a relation to the superfluid phase transition.
We study collective excitations of a trapped Fermi gas at finite temperature using the Bogoliubov--de Gennes mean-field theory in conjunction with the generalized random-phase approximation. The collective excitations are analyzed through the density response of a monopole excitation. We show the appearance of several modes at the normal-fluid--superfluid phase-transition temperature: Higgs mode--like pairing amplitude modulations, analogues of the second sound in the trapped gas, and an edge mode that is also the strongest mode in the response.