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Title: Anomalous specific-heat jump in a two-component ultracold Fermi gas
Author: Sedrakian, Armen
Müether, Herbert
Polls Martí, Artur
Keywords: Termodinàmica
Dinàmica molecular
Gas d'electrons
Molecular dynamics
Electron gas
Issue Date: 2006
Publisher: American Physical Society
Abstract: 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.
Note: Reproducció digital del document proporcionada per PROLA i
It is part of: Physical Review Letters, 2006, vol. 97, núm. 14, p. 140404-1-140404-4
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ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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