TY - JOUR
T1 - Anisotropic 2D diffusive expansion of ultracold atoms in a disordered potential
AU - Robert-De-Saint-Vincent, M.
AU - Brantut, J. P.
AU - Allard, B.
AU - Plisson, T.
AU - Pezzé, L.
AU - Sanchez-Palencia, L.
AU - Aspect, A.
AU - Bourdel, T.
AU - Bouyer, P.
PY - 2010/6/2
Y1 - 2010/6/2
N2 - We study the horizontal expansion of vertically confined ultracold atoms in the presence of disorder. Vertical confinement allows us to realize a situation with a few coupled harmonic oscillator quantum states. The disordered potential is created by an optical speckle at an angle of 30° with respect to the horizontal plane, resulting in an effective anisotropy of the correlation lengths of a factor of 2 in that plane. We observe diffusion leading to non-Gaussian density profiles. Diffusion coefficients, extracted from the experimental results, show anisotropy and strong energy dependence, in agreement with numerical calculations.
AB - We study the horizontal expansion of vertically confined ultracold atoms in the presence of disorder. Vertical confinement allows us to realize a situation with a few coupled harmonic oscillator quantum states. The disordered potential is created by an optical speckle at an angle of 30° with respect to the horizontal plane, resulting in an effective anisotropy of the correlation lengths of a factor of 2 in that plane. We observe diffusion leading to non-Gaussian density profiles. Diffusion coefficients, extracted from the experimental results, show anisotropy and strong energy dependence, in agreement with numerical calculations.
U2 - 10.1103/PhysRevLett.104.220602
DO - 10.1103/PhysRevLett.104.220602
M3 - Article
AN - SCOPUS:77953104398
SN - 0031-9007
VL - 104
JO - Physical Review Letters
JF - Physical Review Letters
IS - 22
M1 - 220602
ER -