Skip to Main content Skip to Navigation
Theses

Manipulation d'atomes froids dans des potentiels lumineux

Jean-Philippe Brantut 1
1 laboratoire Charles Fabry de l'Institut d'Optique / Optique atomique
LCFIO - Laboratoire Charles Fabry de l'Institut d'Optique
Abstract : This thesis presents experiments where Rubidium atoms are manipulated thanks to laser-induced forces. When the laser is far off-resonance, the light-induced force is conservative, and corresponds to light-induced potentials. First, we present an optical dipole trap for Rubidium atoms created by a laser at 1565 nm. In this trap, atoms are cooled by evaporation down to Bose-Einstein condensation. This cooling takes place in the runaway regime, where the density increases with cooling, leading to an improved efficiency. We then present two experiments where a condensate is put into a vertical trampoline. This trampoline is based on an optical lattice created by a vertical standing wave. We study two regimes of this trampoline : in the classical regime, the atoms bounce periodically on the standing wave, while in the quantum regime, atomic matter waves are split in packets that follow separated trajectories, which periodically recombine, leading to interferences. In both regimes the trampoline provides a measurement of gravity. Eventually, we put our condensate in an optical trap that tightly confines atoms in the horizontal plane. The Bose-Einstein condensate is then submitted to a random optical potential created by a laser speckle. We then study the in-plane transport of atoms in the random potential.
Complete list of metadatas

Cited literature [181 references]  Display  Hide  Download

https://pastel.archives-ouvertes.fr/tel-00436639
Contributor : Jean-Philippe Brantut <>
Submitted on : Friday, November 27, 2009 - 11:53:49 AM
Last modification on : Wednesday, September 16, 2020 - 5:40:21 PM
Long-term archiving on: : Thursday, June 17, 2010 - 6:45:52 PM

File

Identifiers

  • HAL Id : tel-00436639, version 1

Citation

Jean-Philippe Brantut. Manipulation d'atomes froids dans des potentiels lumineux. Physique Atomique [physics.atom-ph]. Paris-Sud XI, 2009. Français. ⟨tel-00436639⟩

Share

Metrics

Record views

935

Files downloads

1926