Production efficiency of Feshbach molecules in fermion systems
| dc.creator | Dobrescu, B. E. | |
| dc.creator | Pokrovsky, V. L. | |
| dc.date | 2005-07-30 | |
| dc.date | 2006-04-25 | |
| dc.date.accessioned | 2026-07-07T06:41:28Z | |
| dc.date.available | 2026-07-07T06:41:28Z | |
| dc.description | We present a consistent nonequilibrium theory for the production of molecular dimers from a two-component quantum-degenerate fermion atomic gas, via a linear downward sweep of the magnetic field across a Feshbach resonance. This problem raises interest because it is presently unclear as to why deviations from the universal Landau-Zener formula for the transition probability at two-level crossing are observed in the experimentally measured production efficiencies. We show that the molecular conversion efficiency is represented by a power series in terms of a dimensionless parameter which, in the zero-temperature limit, depends solely on the initial gas density and the Landau-Zener parameter. Our result reveals a hindrance of the canonical Landau-Zener transition probability due to many-body effects, and presents an explanation for the experimentally observed deviations [K.E. Strecker \textit{et al.}, Phys. Rev. Lett. {\bf 91}, 080406 (2003)]. | |
| dc.description | 4 pages, 1 figure | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0508010 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0508010 | |
| dc.identifier | Phys. Lett. A 350, 154 (2006) | |
| dc.identifier | doi:10.1016/j.physleta.2005.10.009 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/101677 | |
| dc.subject | Statistical Mechanics | |
| dc.title | Production efficiency of Feshbach molecules in fermion systems | |
| dc.type | text |