Equation of state and collective frequencies of a trapped Fermi gas along the BEC-unitarity crossover
Year: 2005
Authors: Astrakharchik G.E., Combescot R., Leyronas X., Stringari S.
Autors Affiliation: Univ Trent, Dipartimento Fis, I-38050 Trento, Italy, INFM, BEC, I-38050 Trento, Italy, Ecole Normale Super, Coll France, F-75231 Paris, France, Ecole Normale Super, Lab Kastler Brossel, F-75231 Paris, France, Ecole Normale Super, Lab Phys Stat, F-75231 Paris, France
Abstract: We show that the study of the collective oscillations in a harmonic trap provides a very sensitive test of the equation of state of a Fermi gas near a Feshbach resonance. Using a scaling approach, whose high accuracy is proven by comparison with exact hydrodynamic solutions, the frequencies of the lowest compressional modes are calculated at T=0 in terms of a dimensionless parameter characterizing the equation of state. The predictions for the collective frequencies, obtained from the equations of state of mean-field BCS theory and of recent Monte Carlo calculations, are discussed in detail.
Journal/Review: PHYSICAL REVIEW LETTERS
Volume: 95 (3) Pages from: 030404-1 to: 030404-4
More Information: doi: 10.1103/PhysRevLett.95.030404KeyWords: Ultracold atoms; equation of state; excitations; fermi gas; DOI: 10.1103/PhysRevLett.95.030404ImpactFactor: 7.489Citations: 79data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-10-06References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here