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Production and investigation of quasi-two-dimensional Bose gases

Abstract : When an ultracold bosonic gas is strongly confined along one direction of space, the corre- sponding degrees of freedom are “frozen” and the gas becomes effectively two-dimensional. The production of such quasi-two-dimensional Bose gases with a new experimental setup and subsequent studies of these objects are the principal subject of this thesis manuscript which is divided into two parts. The first part describes the basic experimental apparatus and techniques that permit us to create ultracold Bose gases for various purposes. The particular case of a quasi-two-dimensional Bose gas is discussed in detail in the second part where we describe the production (in which holographic phase plates play an important role) and investigation of this system. The goal of these experiments was the measurement of the quasi-two-dimensional Bose gas's equation of state. It turned out that the otherwise well-established method of absorption imaging gives rise to unexpected effects when applied to quasi-two-dimensional samples. We present a thorough characterisation and elements of possible explanations for these effects.
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https://tel.archives-ouvertes.fr/tel-00469991
Contributor : Steffen Patrick Rath <>
Submitted on : Friday, April 2, 2010 - 10:08:06 PM
Last modification on : Thursday, December 10, 2020 - 12:37:24 PM
Long-term archiving on: : Friday, October 19, 2012 - 11:15:23 AM

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  • HAL Id : tel-00469991, version 1

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Steffen Patrick Rath. Production and investigation of quasi-two-dimensional Bose gases. Atomic Physics [physics.atom-ph]. Université Pierre et Marie Curie - Paris VI, 2010. English. ⟨tel-00469991⟩

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