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- W4365597265 abstract "We study the transport and equilibration properties of a classical Heisenberg chain, whose couplings are random variables drawn from a one-parameter family of power-law distributions. The absence of a scale in the couplings makes the system deviate substantially from the usual paradigm of diffusive spin hydrodynamics, and exhibit a regime of subdiffusive transport with an exponent changing continuously with the parameter of the distribution. We propose a solvable phenomenological model that correctly yields the subdiffusive exponent, thereby linking local fluctuations in the coupling strengths to the long-time, large-distance behaviour. It also yields the finite-time corrections to the asymptotic scaling, which can be important in fitting the numerical data. We show how such exponents undergo transitions as the distribution of the coupling gets wider, marking the passage from diffusion to a regime of slow diffusion, and finally to subdiffusion." @default.
- W4365597265 created "2023-04-15" @default.
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- W4365597265 date "2023-04-11" @default.
- W4365597265 modified "2023-09-23" @default.
- W4365597265 title "Subdiffusive spin transport in disordered classical Heisenberg chains" @default.
- W4365597265 doi "https://doi.org/10.48550/arxiv.2304.05423" @default.
- W4365597265 hasPublicationYear "2023" @default.
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