| Issue |
EPL
Volume 85, Number 2, January 2009
|
|
|---|---|---|
| Article Number | 20004 | |
| Number of page(s) | 5 | |
| Section | General | |
| DOI | https://doi.org/10.1209/0295-5075/85/20004 | |
| Published online | 28 January 2009 | |
Cooper pair turbulence in atomic Fermi gases
1
Department of Physics, Columbia University - New York, NY 10027, USA
2
Center for Materials Theory, Rutgers University - Piscataway, NJ 08854, USA
Corresponding author: dzero@physics.rutger.edu
Received:
25
November
2008
Accepted:
18
December
2008
We investigate under what conditions a uniform quench of a superfluid atomic Fermi gas leads to the emergence of spatial inhomogeneities. We demonstrate that, if the system is larger than the coherence length, the superfluid order parameter becomes spatially nonuniform. Spatial modulations develop through a parametric excitations of pairing modes with opposite momenta. Their growth is eventually suppressed by nonlinear effects resulting in a state characterized by a random superposition of wave packets of the superfluid order parameter. This state can be probed by measuring the molecular momentum distribution following a fast sweep to the BEC side of the Feshbach resonance.
PACS: 05.30.Fk – Fermion systems and electron gas / 32.80.-t – Photoionization and excitation / 74.25.Gz – Optical properties
© EPLA, 2009
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