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- W1520791065 abstract "We study the finite temperature, low energy, long wave-length spectrum of the dynamic structure factor of the spin-$1/2$ antiferromagnetic Heisenberg chain in the presence of exchange anisotropy and external magnetic fields. Using imaginary-time quantum Monte-Carlo we extract parameters, relevant to characterize a {it renormalized} Luttinger liquid. For small momentum our results are consistent with a change from propagating spinon density waves to spin diffusion, described by a finite-frequency spin-current relaxation rate. Results for this relaxation rate as well as other Luttinger liquid parameters are presented versus temperature, momentum, magnetic field, and anisotropy, including finite-size analysis, and checks for anomalous diffusion. Our results are consistent with exact diagonalization and Bethe Ansatz, where available, and with corroborate findings of other previous studies using bosonization, transfer matrix renormalization group, and quantum Monte-Carlo." @default.
- W1520791065 created "2016-06-24" @default.
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- W1520791065 date "2015-01-14" @default.
- W1520791065 modified "2023-09-27" @default.
- W1520791065 title "Hydrodynamic spin fluctuations in the antiferromagnetic Heisenberg chain" @default.
- W1520791065 hasPublicationYear "2015" @default.
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