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Theses

Exotic quantum phenomena in cold atomic gases : numerical approaches

Abstract : The central aim of this thesis is the study of the low-energy and low-temperature properties of strongly correlated systems of bosonic particles interacting via finite- and long-range potentials, and relevant to experimental realization with cold atomic gases. This study is carried out with a combination of state-of-the-art numerical techniques such as Path Integral Monte Carlo and analytical techniques. The main result of my work is the demonstration of the existence of a stripe supersolid phase and of a rare transition between isotropic and anisotropic supersolids in a finite-range interacting model of hard-bosons on a square lattice. I also investigate the out-of-equilibrium scenarios of such models via simulated temperature quenches. Finally, I investigate how restoring energy extensivity in long-range interacting systems can have a profound incidence on the low-energy properties in the thermodynamic limit.
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Guido Masella. Exotic quantum phenomena in cold atomic gases : numerical approaches. Condensed Matter [cond-mat]. Université de Strasbourg, 2019. English. ⟨NNT : 2019STRAF061⟩. ⟨tel-03192184⟩

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