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- W2912400696 abstract "Quasi-one-dimensional lattice systems such as flux ladders with artificial gauge fields host rich quantum-phase diagrams that have attracted great interest. However, so far, most of the work on these systems has concentrated on zero-temperature phases while the corresponding finite-temperature regime remains largely unexplored. The question if and up to which temperature characteristic features of the zero-temperature phases persist is relevant in experimental realizations. We investigate a two-leg ladder lattice in a uniform magnetic field and concentrate our study on chiral edge currents and momentum-distribution functions, which are key observables in ultracold quantum-gas experiments. These quantities are computed for hard-core bosons as well as noninteracting bosons and spinless fermions at zero and finite temperatures. We employ a matrix-product-state based purification approach for the simulation of strongly interacting bosons at finite temperatures and analyze finite-size effects. Our main results concern the vortex-fluid-to-Meissner crossover of strongly interacting bosons. We demonstrate that signatures of the vortex-fluid phase can still be detected at elevated temperatures from characteristic finite-momentum maxima in the momentum-distribution functions, while the vortex-fluid phase leaves weaker fingerprints in the local rung currents and the chiral edge current. In order to determine the range of temperatures over which these signatures can be observed, we introduce a suitable measure for the contrast of these maxima. The results are condensed into a finite-temperature crossover diagram for hard-core bosons." @default.
- W2912400696 created "2019-02-21" @default.
- W2912400696 creator A5006242784 @default.
- W2912400696 creator A5025419115 @default.
- W2912400696 creator A5054496225 @default.
- W2912400696 date "2019-05-01" @default.
- W2912400696 modified "2023-10-16" @default.
- W2912400696 title "Finite-temperature properties of interacting bosons on a two-leg flux ladder" @default.
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- W2912400696 doi "https://doi.org/10.1103/physreva.99.053601" @default.
- W2912400696 hasPublicationYear "2019" @default.
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