Szymańska, MH;
Simons, BD;
Burnett, K;
(2005)
Dynamics of the BCS-BEC crossover in a degenerate fermi gas.
Physical Review Letters
, 94
(17)
, Article e170402. 10.1103/PhysRevLett.94.170402.
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Abstract
We study the short-time dynamics of a degenerate Fermi gas positioned near a Feshbach resonance following an abrupt jump in the atomic interaction resulting from a change of magnetic field. We investigate the dynamics of the condensate order parameter and pair wave function for a range of field strengths. When the jump is sufficient to span the BCS to Bose-Einstein condensation crossover, we show that the rigidity of the momentum distribution precludes any atom-molecule oscillations in the entrance channel dominated resonances observed in 40K and 6Li. Focusing on material parameters tailored to the 40K Feshbach resonance at 202.1 G, we comment on the integrity of the fast sweep projection technique as a vehicle to explore the condensed phase in the crossover region.
| Type: | Article |
|---|---|
| Title: | Dynamics of the BCS-BEC crossover in a degenerate fermi gas |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.94.170402 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.94.170402 |
| Language: | English |
| Additional information: | © 2005 The American Physical Society |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1398702 |
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