Metrology with trapped atoms on a chip using non-degenerate and degenerate quantum gases
Year: 2012
Type: dissertation
Abstract: Atom trapping on chip opens new perspectives for time and frequency metrology and integrated atom interferometry. The TACC experiment (Trapped Atomic Clock on a Chip) was built to study the potential of degenerate and non-degenerate quantum gases for metrology and to develop new tools for atom manipulation. One of the aims is the demonstration of a secondary frequency standard with a stability of a few 10-13 at one second. This is the context of this thesis. We report on several metrology experiments carried out with thermal clouds or Bose-Einstein condensates. Firstly, we demonstrate a stability of 5.8 x 10-13 at one second and characterize the limiting technical noise. We then present a study of the coherence of Bose- Einstein condensates and, in particular, the eect of interactions. The data is compared with a numerical model. Secondly, we introduce several tools for producing and manipulating atoms on a chip. We show the realization of an atomic microwave powermeter and assess the current limits of its performance. We then demonstrate that high-gradient microwave elds allow one to coherently manipulate the atoms' external motion. Finally, we present and characterize a new device for high-repetition rate atom loading involving fast modulation of the rubidium pressure.
Authors: DUGRAIN, Vincent, REICHEL, Jakob
Institution: Laboratoire Kastler Brossel
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W658389281