Four-Wave mixing in degenerate Fermi gases: Beyond the undepleted pump approximation
arXiv:cond-mat/0301278 · doi:10.1103/PhysRevA.67.063603
Abstract
We analyze the full nonlinear dynamics of the four-wave mixing between an incident beam of fermions and a fermionic density grating. We find that when the number of atoms in the beam is comparable to the number of atoms forming the grating, the dephasing of that grating, which normally leads to a decay of its amplitude, is suppressed. Instead, the density grating and the beam density exhibit large nonlinear coupled amplitude oscillations. In this case four-wave mixing can persist for much longer times compared to the case of negligible back-action. We also evaluate the efficiency of the four-wave mixing and show that it can be enhanced by producing an initial density grating with an amplitude that is less than the maximum value. These results indicate that efficient four-wave mixing in fermionic alkali gases should be experimentally observable.
arXiv comment9 pages, 8 figures
References in corpus (14)
- Formation and Propagation of Matter Wave Soliton Trains
- Dark Solitons in Bose-Einstein Condensates
- Observation of a Strongly-Interacting Degenerate Fermi Gas of Atoms
- Two-species mixture of quantum degenerate Bose and Fermi gases
- Fermi-Bose quantum degenerate ^40 K - ^87 Rb mixture with attractive interaction
- Photoassociation of sodium in a Bose-Einstein condensate
- Sympathetic cooling of bosonic and fermionic Lithium gases towards quantum degeneracy
- Mach-Zehnder Bragg interferometer for a Bose-Einstein Condensate
- Generation of macroscopic pair-correlated atomic beams by four-wave mixing in Bose-Einstein condensates
- Exploring a quantum degenerate gas of fermionic atoms
- Does matter wave amplification work for fermions?
- Atomic four-wave mixing: fermions versus bosons
- Talbot Oscillations and Periodic Focusing in a One-Dimensional Condensate
- Four-wave mixing in degenerate atomic gases