From quantum to thermal topological-sector fluctuations of strongly interacting bosons in a ring lattice

Tommaso Roscilde, Michael F. Faulkner, Steven T. Bramwell and Peter C. W. Holdsworth

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We extended the idea of topological-sector fluctuations to quantum and thermal phase slips in a model of strongly interacting bosons in a ring lattice. This provided strong evidence for the phase-slip fluctuations approaching a jump (distinct from the BKT universal jump) at the superfluid - Mott insulator transition. This paper was submitted by invitation. It is a special issue article on strongly interacting quantum gases in one dimension.