Large-N expansion for unitary superfluid Fermi gases
| dc.creator | Veillette, M. Y. | |
| dc.creator | Sheehy, D. E. | |
| dc.creator | Radzihovsky, L. | |
| dc.date | 2006-10-28 | |
| dc.date | 2007-05-14 | |
| dc.date.accessioned | 2026-07-07T12:37:43Z | |
| dc.date.available | 2026-07-07T12:37:43Z | |
| dc.description | We analyze strongly interacting Fermi gases in the unitary regime by considering the generalization to an arbitrary number N of spin-1/2 fermion flavors with Sp(2N) symmetry. For N=\infty this problem is exactly solved by the BCS-BEC mean-field theory, with corrections small in the parameter 1/N. The large-N expansion provides a systematic way to determine corrections to mean-field predictions, allowing the calculation of a variety of thermodynamic quantities at (and in the proximity to) unitarity, including the energy, the pairing gap, and upper-critical polarization (in the case of a polarized gas) for the normal to superfluid instability. For the physical case of N=1, among other quantities, we predict in the unitarity regime, the energy of the gas to be ξ=0.28 times that for the non-interacting gas and the pairing gap to be 0.52 times the Fermi energy. | |
| dc.description | 13 pages | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0610798 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0610798 | |
| dc.identifier | Phys.Rev.A75:043614,2007 | |
| dc.identifier | doi:10.1103/PhysRevA.75.043614 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/218534 | |
| dc.subject | Other Condensed Matter | |
| dc.title | Large-N expansion for unitary superfluid Fermi gases | |
| dc.type | text |