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Generalized Galitskii approach for the vertex function of a Fermi gas with resonant interaction.

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Generalized Galitskii approach for the vertex function of a Fermi gas with resonant interaction. / Vagov, A.; Schomerus, Henning; Shanenko, A.
In: Physical review B, Vol. 76, 2007, p. 214513.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Vagov, A, Schomerus, H & Shanenko, A 2007, 'Generalized Galitskii approach for the vertex function of a Fermi gas with resonant interaction.', Physical review B, vol. 76, pp. 214513. https://doi.org/10.1103/PhysRevB.76.214513

APA

Vagov, A., Schomerus, H., & Shanenko, A. (2007). Generalized Galitskii approach for the vertex function of a Fermi gas with resonant interaction. Physical review B, 76, 214513. https://doi.org/10.1103/PhysRevB.76.214513

Vancouver

Vagov A, Schomerus H, Shanenko A. Generalized Galitskii approach for the vertex function of a Fermi gas with resonant interaction. Physical review B. 2007;76:214513. doi: 10.1103/PhysRevB.76.214513

Author

Vagov, A. ; Schomerus, Henning ; Shanenko, A. / Generalized Galitskii approach for the vertex function of a Fermi gas with resonant interaction. In: Physical review B. 2007 ; Vol. 76. pp. 214513.

Bibtex

@article{096cfdffd4e545a496285f3363dd93fa,
title = "Generalized Galitskii approach for the vertex function of a Fermi gas with resonant interaction.",
abstract = "We present a generalized Galitskii approach for the Bethe-Salpeter equation for the two-particle vertex function of a Fermi system with the resonant interaction by accounting for the resonant state in the scattering potential and utilizing the universal form of the resonant scattering amplitude. The procedure can be carried out both for the normal as well as for the condensate state. In both cases, the vertex function in the vicinity of the resonance is shown to formally coincide with that obtained for a weakly attractive Fermi gas. Thus we justify the popular calculational framework in which results for the weakly attractive Fermi gas are formally extrapolated into the domain of strong coupling, and further to the repulsive side of the resonance, where molecular states are formed.",
author = "A. Vagov and Henning Schomerus and A. Shanenko",
year = "2007",
doi = "10.1103/PhysRevB.76.214513",
language = "English",
volume = "76",
pages = "214513",
journal = "Physical review B",
issn = "1550-235X",
publisher = "AMER PHYSICAL SOC",

}

RIS

TY - JOUR

T1 - Generalized Galitskii approach for the vertex function of a Fermi gas with resonant interaction.

AU - Vagov, A.

AU - Schomerus, Henning

AU - Shanenko, A.

PY - 2007

Y1 - 2007

N2 - We present a generalized Galitskii approach for the Bethe-Salpeter equation for the two-particle vertex function of a Fermi system with the resonant interaction by accounting for the resonant state in the scattering potential and utilizing the universal form of the resonant scattering amplitude. The procedure can be carried out both for the normal as well as for the condensate state. In both cases, the vertex function in the vicinity of the resonance is shown to formally coincide with that obtained for a weakly attractive Fermi gas. Thus we justify the popular calculational framework in which results for the weakly attractive Fermi gas are formally extrapolated into the domain of strong coupling, and further to the repulsive side of the resonance, where molecular states are formed.

AB - We present a generalized Galitskii approach for the Bethe-Salpeter equation for the two-particle vertex function of a Fermi system with the resonant interaction by accounting for the resonant state in the scattering potential and utilizing the universal form of the resonant scattering amplitude. The procedure can be carried out both for the normal as well as for the condensate state. In both cases, the vertex function in the vicinity of the resonance is shown to formally coincide with that obtained for a weakly attractive Fermi gas. Thus we justify the popular calculational framework in which results for the weakly attractive Fermi gas are formally extrapolated into the domain of strong coupling, and further to the repulsive side of the resonance, where molecular states are formed.

U2 - 10.1103/PhysRevB.76.214513

DO - 10.1103/PhysRevB.76.214513

M3 - Journal article

VL - 76

SP - 214513

JO - Physical review B

JF - Physical review B

SN - 1550-235X

ER -