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Non-conventional Many-body Phases in Ultracold Dipolar Systems

Abstract : The problem of revealing anddescribing novel macroscopic quantum statescharacter- ized by exotic and non-conventionalproperties is of fundamental importance formodern physics. Such states offer fascinatingprospects for potential applications in quantumin- formation processing, quantum simulation,and material research. In the present Thesis wedevelop a theory for describing nonconventionalphases of ultracold dipolar gases.The related systems of large-spin atoms, polarmolecules, and dipolar excitons in semiconductorsare actively studied in experiments.We put the main emphasis on revealing the roleof the long-range character of the dipole-dipoleinteraction.We consider the effect of rotonization for a 2Dweakly interacting gas of tilted dipolar bosonsin a homogeneous layer. We predict the effectof rotonization for a weakly correlated Bosegas of dipolar excitons in a semiconductorlayer and calculate the stability diagram. Wethen consider p-wave superfluids of identicalfermions in 2D lattices. Finally, we discussanother interesting novel superfluid offermionic polar molecules
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Submitted on : Wednesday, January 17, 2018 - 4:22:32 PM
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  • HAL Id : tel-01680324, version 2

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Aleksey Fedorov. Non-conventional Many-body Phases in Ultracold Dipolar Systems. Quantum Physics [quant-ph]. Université Paris-Saclay, 2017. English. ⟨NNT : 2017SACLS580⟩. ⟨tel-01680324v2⟩

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