Effective theory of excitations in a Feshbach resonant superfluid
| dc.creator | Liu, W. Vincent | |
| dc.date | 2005-08-05 | |
| dc.date | 2005-08-13 | |
| dc.date.accessioned | 2026-07-07T06:26:31Z | |
| dc.date.available | 2026-07-07T06:26:31Z | |
| dc.description | A strongly interacting Fermi gas, such as that of cold atoms operative near a Feshbach resonance, is difficult to study by perturbative many-body theory to go beyond mean field approximation. Here I develop an effective field theory for the resonant superfluid based on broken symmetry. The theory retains both fermionic quasiparticles and superfluid phonons, the interaction between them being derived non-perturbatively. The theory converges and can be improved order by order, in a manner governed by a low energy expansion rather than by coupling constant. I apply the effective theory to calculate the specific heat and propose a mechanism of understanding the empirical power law of energy versus temperature recently measured in a heat capacity experiment. | |
| dc.description | 4+ pages, 1 figure; Added references, corrected and clarified minor statements (v.2) | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0508139 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0508139 | |
| dc.identifier | Phys. Rev. Lett. 96, 080401 (2006) | |
| dc.identifier | doi:10.1103/PhysRevLett.96.080401 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/97127 | |
| dc.subject | Other Condensed Matter | |
| dc.subject | Superconductivity | |
| dc.title | Effective theory of excitations in a Feshbach resonant superfluid | |
| dc.type | text |