Polarized Fermi gases at finite temperature in the BCS-BEC crossover

Autor:	Pantel, Pierre-Alexandre, Davesne, Dany, Urban, Michael
Rok vydání:	2014
Předmět:	Condensed Matter - Quantum Gases
Zdroj:	Phys. Rev. A 90, 053629 (2014)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevA.90.053629
Popis:	We consider a polarized Fermi gas in the BCS-BEC crossover region above the critical temperature within a T matrix formalism. By treating the mean-field like shift of the quasiparticle energies in a self-consistent manner, we avoid the known pathological behavior of the standard Nozieres-Schmitt-Rink approach in the polarized case, i.e., the polarization has the right sign and the spin polarizability is positive. The momentum distributions of the correlated system are computed and it is shown that, in the zero-temperature limit, they satisfy the Luttinger theorem. Results for the phase diagram, the spin susceptibility, and the compressibility are discussed. Comment: 9 pages; v2: references and comparison with more recent experimental data added; v3: reference added and minor corrections
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1409.3482 Zobrazit plný text záznamu View this record from Arxiv