Density fluctuations in quasi-one dimensional ultracold bosonic gases
Julien Armijo
Broschiertes Buch

Density fluctuations in quasi-one dimensional ultracold bosonic gases

Probing thermodynamics and correlations in interacting quantum gases on an atom chip

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The repulsive 1D Bose gas is an emblematic model of many-body quantum physics whose solutions are known since the 60's. However it is only recently that experiments with ultracold atoms in tight waveguides allowed to test the theory, also raising new puzzles. This manuscript presents the implementation of a new experimental set-up, based on microfabricated devices called "atom chips", and the explorations that followed. The imaging was optimized to allow precise statistical studies of the in-situ atomic profiles. Density fluctuations up to their third moment are used as a powerful probe for th...