Pair correlations in the normal phase of an attractive Fermi gas

Autor: G. Calvanese Strinati, Manuel Jäger, J. Hecker Denschlag, Pierbiagio Pieri, M. Pini

Publikováno v: New journal of physics 22 (2020): 083008-1–083008-21. doi:10.1088/1367-2630/ab9ee3
info:cnr-pdr/source/autori:Pini M.; Pieri P.; Jager M.; Denschlag J.H.; Strinati G.C./titolo:Pair correlations in the normal phase of an attractive Fermi gas/doi:10.1088%2F1367-2630%2Fab9ee3/rivista:New journal of physics/anno:2020/pagina_da:083008-1/pagina_a:083008-21/intervallo_pagine:083008-1–083008-21/volume:22

In a recent paper (2019 Phys. Rev. A 99, 053617), the total number of fermion pairs in a spin-balanced two-component Fermi gas of 6Li atoms was experimentally probed in the normal phase above the superfluid critical temperature, in order to investiga

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Fermi gas throughout the BCS-BEC crossover: Comparative study of t-matrix approaches with various degrees of self-consistency

Autor: Pierbiagio Pieri, G. Calvanese Strinati, M. Pini

Publikováno v: Physical Review B 99 (2019): 094502–094502. doi:10.1103/PhysRevB.99.094502
info:cnr-pdr/source/autori:Pini, M.; Pieri, P.; Strinati, G. Calvanese/titolo:Fermi gas throughout the BCS-BEC crossover: Comparative study of t-matrix approaches with various degrees of self-consistency/doi:10.1103%2FPhysRevB.99.094502/rivista:Physical Review B/anno:2019/pagina_da:094502/pagina_a:094502/intervallo_pagine:094502–094502/volume:99

The diagrammatic t-matrix approximation has often been adopted to describe a dilute Fermi gas. This approximation, originally considered by Galitskii for a repulsive inter-particle interaction (Galitskii-1958), has later been widely utilized for an a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0a673d67578d5eebad87221439992332

Gap equation with pairing correlations beyond the mean-field approximation and its equivalence to a Hugenholtz-Pines condition for fermion pairs

Autor: Pierbiagio Pieri, G. Calvanese Strinati, L. Pisani

Publikováno v: Physical Review B. 98

The equation for the gap parameter represents the main equation of the pairing theory of superconductivity. Although it is formally defined through a single-particle property, physically, it reflects the pairing correlations between opposite-spin fer

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::29ce37d7841136d5d9b68ca56a5bf629
https://doi.org/10.1103/physrevb.98.104507

Entanglement between pairing and screening in the Gorkov-Melik-Barkhudarov correction to the critical temperature throughout the BCS-BEC crossover

Autor: L. Pisani, G. Calvanese Strinati, Pierbiagio Pieri, Andrea Perali

The theoretical description of the critical temperature Tc of a Fermi superfluid dates back to the work by Gor'kov and Melik-Barkhudarov (GMB), who addressed it for a weakly-coupled (dilute) superfluid in the BCS (weak-coupling) limit of the BCS-BEC

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::01316b45b22d5ef2375484faa31a3342
http://arxiv.org/abs/1712.04666