Carregant...
Fitxers
Tipus de document
ArticleVersió
Versió publicadaData de publicació
Tots els drets reservats
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/12843
Anomalous specific-heat jump in a two-component ultracold Fermi gas
Títol de la revista
Director/Tutor
ISSN de la revista
Títol del volum
Recurs relacionat
Resum
The thermodynamic functions of a Fermi gas with spin population imbalance are studied in the temperature-asymmetry plane in the BCS limit. The low-temperature domain is characterized by an anomalous enhancement of the entropy and the specific heat above their values in the unpaired state, decrease of the gap and eventual unpairing phase transition as the temperature is lowered. The unpairing phase transition induces a second jump in the specific heat, which can be measured in calorimetric experiments. While the superfluid is unstable against a supercurrent carrying state, it may sustain a metastable state if cooled adiabatically down from the stable high-temperature domain. In the latter domain the temperature dependence of the gap and related functions is analogous to the predictions of the BCS theory.
Matèries
Matèries (anglès)
Citació
Citació
SEDRAKIAN, Armen, MÜETHER, Herbert, POLLS MARTÍ, Artur. Anomalous specific-heat jump in a two-component ultracold Fermi gas. _Physical Review Letters_. 2006. Vol. 97, núm. 14, pàgs. 140404-1-140404-4. [consulta: 23 de gener de 2026]. ISSN: 0031-9007. [Disponible a: https://hdl.handle.net/2445/12843]