Title data
Hannibal, S. ; Kettmann, P. ; Croitoru, Mikhail D. ; Vagov, Alexei ; Axt, Vollrath M. ; Kuhn, Tilmann:
Quench dynamics of an ultracold Fermi gas in the BCS regime : Spectral properties and confinement-induced breakdown of the Higgs mode.
In: Physical Review A.
Vol. 91
(2015)
Issue 4
.
- Art.Nr. 043630, 11 S..
ISSN 1094-1622
DOI: https://doi.org/10.1103/PhysRevA.91.043630
Project information
Project financing: |
Supported by the BELSPO Back to Belgium Grant. |
---|
Abstract in another language
The Higgs amplitude mode of the order parameter of an ultracold confined Fermi gas in the BCS regime after a quench of the coupling constant is analyzed theoretically. A characteristic feature is a damped oscillation which at a certain transition time changes into a rather irregular dynamics. We compare the numerical solution of the full set of nonlinear equations of motion for the normal and anomalous Bogoliubov quasiparticle excitations with a linearized approximation. In doing so the transition time as well as the difference between resonant systems, i.e., systems where the Fermi energy is close to a sub-band minimum, and off-resonant systems can be well understood and traced back to the system and geometry parameters.
Further data
Item Type: | Article in a journal |
---|---|
Refereed: | Yes |
Keywords: | Higgs amplitude mode; ultracold confined Fermi gas; BCS regime; quench dynamics |
Institutions of the University: | Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics III > Chair Theoretical Physics III - Univ.-Prof. Dr. Martin Axt Faculties Faculties > Faculty of Mathematics, Physics und Computer Science Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics III |
Result of work at the UBT: | Yes |
DDC Subjects: | 500 Science > 530 Physics |
Date Deposited: | 03 Nov 2017 09:19 |
Last Modified: | 04 Dec 2020 13:31 |
URI: | https://eref.uni-bayreuth.de/id/eprint/40268 |