author = "Sanchez-Palencia, Laurent"

Found 72 documents, displaying page 4 of 8

## 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

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

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

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

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

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

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

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

Found 72 documents, displaying page 4 of 8