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Bosons in Synthetic Gauge Fields

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Condensates of multicomponent bosons offer rich physical systems due their extra degrees of freedom originating, for instance, from internal spin states. In recent years, there have been considerable experimental advances in creating “synthetic” gauge fields and spin orbit couplings using optical dressing techniques in such multicomponent condensates. In the first part of this talk, I will consider the conceptually simple question of how bosons with Rashba spin-orbit coupling condense. In particular I will discuss how quantum fluctuations uniquely determine the ground state through the mechanism of order by disorder. I will then move on to introduce the notion of SU(3) spin-orbit coupling in ultracold atoms which arises for three-component bosons in the presence of synthetic gauge fields. In particular, I will describe how it is possible to realize a Chern insulator with a spatially homogeneous gauge field.

This talk is part of the Theory of Condensed Matter series.

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