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Titolo:
Dynamic structure factor of a superfluid Fermi gas
Autore:
Minguzzi, A; Ferrari, G; Castin, Y;
Indirizzi:
Scuola Normale Super Pisa, Ist Nazl Fis Mat & Classe Sci, I-56126 Pisa, Italy Scuola Normale Super Pisa Pisa Italy I-56126 se Sci, I-56126 Pisa, Italy Univ Florence, Ist Nazl Fis Mat, I-50125 Florence, Italy Univ Florence Florence Italy I-50125 zl Fis Mat, I-50125 Florence, Italy Univ Florence, European Nonlinear Spect, I-50125 Florence, Italy Univ Florence Florence Italy I-50125 near Spect, I-50125 Florence, Italy Ecole Normale Super, Lab Kastler Brossel, F-75231 Paris, France Ecole Normale Super Paris France F-75231 Brossel, F-75231 Paris, France
Titolo Testata:
EUROPEAN PHYSICAL JOURNAL D
fascicolo: 1, volume: 17, anno: 2001,
pagine: 49 - 55
SICI:
1434-6060(200110)17:1<49:DSFOAS>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
BOSE-EINSTEIN CONDENSATE; COLLECTIVE EXCITATIONS; OPTICAL-DETECTION; MAGNETIC TRAP; SCATTERING; LI-6; TRANSITION; LIGHT; ATOMS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
29
Recensione:
Indirizzi per estratti:
Indirizzo: Minguzzi, A Scuola Normale Super Pisa, Ist Nazl Fis Mat & Classe Sci, Piazza Cavalieri7, I-56126 Pisa, Italy Scuola Normale Super Pisa Piazza Cavalieri 7 Pisa Italy I-56126
Citazione:
A. Minguzzi et al., "Dynamic structure factor of a superfluid Fermi gas", EUR PHY J D, 17(1), 2001, pp. 49-55

Abstract

We describe the excitation spectrum of a two-component neutral Fermi gas with attractive interactions in the superfluid phase at finite temperature by deriving a suitable Random-Phase approximation in the collisionless regime with the technique of functional derivatives. The obtained spectrum for the homogeneous gas at small wavevectors contains the Bogoliubov-Anderson phonon and is essentially different from the spectrum predicted by the staticBogoliubov theory, which instead shows an unphysically large response. We adapt the results for the homogeneous system to obtain the dynamic structure factor of a harmonically confined superfluid and we identify in the spectrum a unique feature of the superfluid phase.

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Documento generato il 05/12/20 alle ore 01:10:21