Cheaper access to universal fluctuations in integrable spin chains from boundary effects.
basic_science · Level V
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- Record sourced from PubMed, PMID 41715806.
- Also identified by DOI 10.1103/tw1y-wvvh.
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Abstract
Observing superdiffusive fluctuations from Kardar-Parisi-Zhang universality in isotropic integrable spin chains is usually challenging as it requires a fairly large number of spins in interaction. We demonstrate in this paper, in the context of classical spins, that accounting for boundary effects lowers the bar, down to a few dozen spins in some cases. Additionally, boundaries control the relaxation to stationarity, which leads to many new universal scaling functions to explore, both in periodic spin chains and for open chains with magnetization imposed by reservoirs at the ends.