Skip to Main content Skip to Navigation
Theses

MANIPULATION D'ATOMES DANS DES PIÈGES DIPOLAIRES MICROSCOPIQUES ET ÉMISSION CONTRÔLÉE DE PHOTONS PAR UN ATOME UNIQUE

Benoît Darquié 1
1 Laboratoire Charles Fabry de l'Institut d'Optique / Optique quantique
LCFIO - Laboratoire Charles Fabry de l'Institut d'Optique
Abstract : This work deals with the manipulation of single atoms of rubidium 87 in microscopic optical dipole traps, in order to use them for quantum information processing. The experimental setup is based on a high numerical aperture lens which allows us to focus a beam to the diffraction limit and collects the light emitted by the atoms with a high efficiency.

We have characterized the geometry of the potential and the movement of the trapped atoms by measuring oscillation frequencies and mean energies of the atoms.

To demonstrate that our setup is well suited to quantum information processing, we prove its scalability. Using a programmable phase modulator and holographic techniques, we have generated, from a single beam, arrays of micro-dipole traps, each of them being optically addressable.

In order to realize two quantum bit logic gates, we have decided to go towards conditional entanglement. This requires the controlled emission of single photons by each of the atoms, which is obtained after a pulsed excitation. We have developed a new laser system delivering nanosecond pulses. It allows us to drive coherently the closed transition (5S1/2, F = 2, mF = 2) towards (5P3/2, F = 3, mF = 3). We then observed Rabi oscillations and quantum beats with single atoms. By adjusting the power of the laser source to realize pi-pulses, we obtain a triggered single photon source with a high flux of photons and a weak rate of pulses containing two photons.
Complete list of metadatas

Cited literature [139 references]  Display  Hide  Download

https://pastel.archives-ouvertes.fr/tel-00011604
Contributor : Benoît Darquié <>
Submitted on : Tuesday, February 14, 2006 - 2:01:25 PM
Last modification on : Wednesday, September 16, 2020 - 5:40:35 PM
Long-term archiving on: : Saturday, April 3, 2010 - 7:57:06 PM

Identifiers

  • HAL Id : tel-00011604, version 1

Collections

Citation

Benoît Darquié. MANIPULATION D'ATOMES DANS DES PIÈGES DIPOLAIRES MICROSCOPIQUES ET ÉMISSION CONTRÔLÉE DE PHOTONS PAR UN ATOME UNIQUE. Physique Atomique [physics.atom-ph]. Université Paris Sud - Paris XI, 2005. Français. ⟨tel-00011604⟩

Share

Metrics

Record views

807

Files downloads

2727