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- W4320350479 abstract "Concepts of complex partition functions and the Fisher zeros provide intrinsic statistical mechanisms for finite temperature and real time dynamical phase transitions. We extend the utility of these complexifications to quantum phase transitions. We exactly identify different Fisher zeros on lines or closed curves and elucidate their correspondence with domain-wall excitation or confined meson for the one-dimensional transverse field Ising model. The crossover behavior of Fisher zeros provides a fascinating picture for criticality near the quantum phase transition, where the excitation energy scales are quantitatively determined. We further confirm our results by tensor network calculation and demonstrate a clear signal of deconfined meson excitation from the breaking of the closed zero curves. Our results unambiguously show significant features of the Fisher zeros for a quantum phase transition and open up a new route to explore quantum criticality." @default.
- W4320350479 created "2023-02-13" @default.
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- W4320350479 date "2022-11-01" @default.
- W4320350479 modified "2023-09-27" @default.
- W4320350479 title "Signatures of quantum criticality in the complex inverse temperature plane" @default.
- W4320350479 doi "https://doi.org/10.48550/arxiv.2211.00813" @default.
- W4320350479 hasPublicationYear "2022" @default.
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