Results
author = "Sanchez-Palencia, Laurent"
Dipole Oscillations of a Fermi Gas in a Disordered Trap: Damping and Localization
Description :
We theoretically study the dipole oscillations of an ideal Fermi gas in a
disordered trap. We show that even weak disorder induces strong damping of the
oscillations and we identify a metal-insulator crossover. For very weak
disorder, we show that damping results from a dephasing effect related to...
Repository :
arXiv
Language(s) :
Undetermined
Anderson localization of matter waves in tailored disordered potentials
Description :
We show that, in contrast to immediate intuition, Anderson localization of
noninteracting particles induced by a disordered potential in free space can
increase (i.e., the localization length can decrease) when the particle energy
increases, for appropriately tailored disorder correlations. We pre...
Repository :
arXiv
Language(s) :
Undetermined
Matter Wave Transport and Anderson Localization in Anisotropic 3D Disorder
Description :
We study quantum transport in anisotropic 3D disorder and show that non
rotation invariant correlations can induce rich diffusion and localization
properties. For instance, structured finite-range correlations can lead to the
inversion of the transport anisotropy. Moreover, working beyond the
self...
Repository :
arXiv
Language(s) :
Undetermined
Stochastic resonance in periodic potentials: realization in a dissipative optical lattice
Author(s) :
Schiavoni, Michele
,
Carminati, Francois-Regis
,
Sanchez-Palencia, Laurent
,
Renzoni, Ferruccio
,
Grynberg, Gilbert
Description :
We have observed the phenomenon of stochastic resonance on the Brillouin propagation modes of a dissipative optical lattice. Such a mode has been excited by applying a moving potential modulation with phase velocity equal to the velocity of the mode. Its amplitude has been characterized by the cente...
Repository :
HAL - Hyper Article on Line
Language(s) :
English
Dark propagation modes in optical lattices
Author(s) :
Schiavoni, Michele
,
Sanchez-Palencia, Laurent
,
Carminati, Francois-Regis
,
Renzoni, Ferruccio
,
Grynberg, Gilbert
Description :
We examine the stimulated light scattering onto the propagation modes of a dissipative optical lattice. We show that two different pump-probe configurations may lead to the excitation, via different mechanisms, of the same mode. We found that in one configuration the scattering on the propagation mo...
Repository :
HAL - Hyper Article on Line
Language(s) :
English
Rayleigh Scattering and Atomic Dynamics in Dissipative Optical Lattices
Author(s) :
Carminati, François-Régis
,
Sanchez-Palencia, Laurent
,
Schiavoni, Michele
,
Renzoni, Ferruccio
,
Grynberg, Gilbert
Description :
We investigate Rayleigh scattering in dissipative optical lattices. In particular, following recent proposals (S.~Guibal {\it et al}, Phys. Rev. Lett. {\bf 78}, 4709 (1997); C.~Jurczak {\it et al}, Phys. Rev. Lett. {\bf 77}, 1727 (1996)), we study whether the Rayleigh resonance originates from the d...
Repository :
HAL - Hyper Article on Line
Language(s) :
English
Non-Gaussian Velocity Distributions in Optical Lattices
Author(s) :
Jersblad, Johan
,
Ellmann, Harald
,
Stöchkel, Kristian
,
Kastberg, Anders
,
Sanchez-Palencia, Laurent
,
Kaiser, Robin
Description :
We present a detailed experimental study of the velocity distribution of atoms cooled in an optical lattice. Our results are supported by full-quantum numerical simulations. Even though the Sisyphus effect, the responsible cooling mechanism, has been used extensively in many cold atom experiments, n...
Repository :
HAL - Hyper Article on Line
Language(s) :
English
Damping rates of the atomic velocity in Sisyphus cooling
Author(s) :
Sanchez-Palencia, Laurent
,
Schiavoni, Michele
,
Carminati, François-Régis
,
Renzoni, Ferruccio
,
Grynberg, Gilbert
Description :
We present a theoretical and experimental study of the damping process ofthe atomic velocity in Sisyphus cooling. The relaxation rates of the atomickinetic temperature are determined for a 3D lin$\perp$lin optical lattice.We find that the damping rates of the atomic temperature depend linearly onthe...
Repository :
HAL - Hyper Article on Line
Language(s) :
English
Atomic Fermi-Bose mixtures in inhomogeneous and random lattices: From Fermi glass to quantum spin glass and quantum percolation
Author(s) :
Sanpera, Anna
,
Kantian, Adrian
,
Sanchez-Palencia, Laurent
,
Zakrzewski, Jakub
,
Lewenstein, Maciej
Description :
We investigate atomic Fermi-Bose mixtures in inhomogeneous and random optical lattices in the limit of strong atom-atom interactions. We derive the effective Hamiltonian describing the dynamics of the system and discuss its low temperature physics. We demonstrate possibility of controlling the inter...
Repository :
HAL - Hyper Article on Line
Language(s) :
English
Ultracold Bose Gases in 1D Disorder: From Lifshits Glass to Bose-Einstein Condensate
Author(s) :
Lugan, Pierre
,
Clément, David
,
Bouyer, Philippe
,
Aspect, Alain
,
Lewenstein, Maciej
,
Sanchez-Palencia, Laurent
Description :
We study an ultracold Bose gas in the presence of 1D disorder for repulsive inter-atomic interactions varying from zero to the Thomas-Fermi regime. We show that for weak interactions the Bose gas populates a finite number of localized single-particle Lifshits states, while for strong interactions a ...
Repository :
HAL - Hyper Article on Line
Language(s) :
English