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dc.contributor.authorDutta, Shovan
dc.identifier.otherbibid: 10489809
dc.description.abstractMotivated by rapid experimental progress in the fields of ultracold atoms and quantum optics, I present a series of theoretical studies which explore collective phenomena in quantum gases of atoms and photons. In Chapter 1, I highlight the major developments in the research field and identify the overarching themes and motivations. I also provide a roadmap for the rest of the thesis and summarize the main results. The remaining eight chapters contain original studies, organized along three broad motifs. In Chapters 2 through 5, I investigate how the nature of collective excitations and quasiparticles can be explored in modern experiments. More specifically, I model the dynamics of a spin impurity in a Bose lattice gas, develop a protocol for observing fractionalized excitations or anyons in an optical cavity, and characterize the collective dynamics of Bogoliubov quasiparticles and domain walls in a Fermi superfluid. In Chapters 6 and 7, I examine unconventional superfluid phases in spin-imbalanced Fermi gases. In particular, I propose a novel technique for engineering the long-sought-after Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phase and study the relative stability of exotic phases across a dimensional crossover. Finally, Chapters 8 and 9 are devoted to studies of kinetics in out-of-equilibrium systems. I model the formation of a Bose-Einstein condensate in a dimple trap and characterize the approach to thermal equilibrium in quasi-one-dimensional geometries.
dc.subjectAtomic physics
dc.subjectCondensed matter physics
dc.subjectBose condensate
dc.subjectFermi superfluid
dc.subjectQuantum gas
dc.subjectQuantum physics
dc.titleCollective Phenomena in Quantum Gases
dc.typedissertation or thesis University of Philosophy D., Physics
dc.contributor.chairMueller, Erich
dc.contributor.committeeMemberParpia, Jeevak M.
dc.contributor.committeeMemberElser, Veit

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