Cooper pair turbulence in atomic fermi gases

TY - JOUR

T1 - Cooper pair turbulence in atomic fermi gases

AU - Dzero, M.

AU - Yuzbashyan, E. A.

AU - Altshuler, B. L.

PY - 2009

Y1 - 2009

N2 - 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.

AB - 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.

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U2 - https://doi.org/10.1209/0295-5075/85/20004

DO - https://doi.org/10.1209/0295-5075/85/20004

M3 - Article

SN - 0295-5075

VL - 85

JO - Europhysics Letters

JF - Europhysics Letters

IS - 2

M1 - 20004

ER -