Probing two-fluid hydrodynamics in a trapped Fermi superfluid at unitarity
| dc.creator | Taylor, Edward | |
| dc.creator | Hu, Hui | |
| dc.creator | Liu, Xia-Ji | |
| dc.creator | Griffin, Allan | |
| dc.date | 2007-09-05 | |
| dc.date | 2007-11-20 | |
| dc.date.accessioned | 2026-07-07T08:43:33Z | |
| dc.date.available | 2026-07-07T08:43:33Z | |
| dc.description | We develop a variational approach to calculate the density response function at finite temperatures of the lowest-lying two-fluid modes in a trapped two-component Fermi superfluid close to a Feshbach resonance. The out-of-phase oscillations, which are the analogue in trapped gases of second sound in uniform superfluids, have so far not been observed in cold-atom experiments. At unitarity, we show that these modes are observable at finite temperatures via two-photon Bragg scattering, whose spectrum is related to the imaginary part of density response function. This provides direct evidence for superfluidity and a promising way to test microscopic results for thermodynamics at unitarity. | |
| dc.description | Figures 1-3 modified, Figure 4 added, minor changes made in text, references updated | |
| dc.identifier | https://arxiv.org/abs/0709.0698 | |
| dc.identifier | http://arxiv.org/abs/0709.0698 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/142352 | |
| dc.subject | Other Condensed Matter | |
| dc.title | Probing two-fluid hydrodynamics in a trapped Fermi superfluid at unitarity | |
| dc.type | text |