Experimental Verification of a Universal Operator Growth Hypothesis

Fuente: arXiv
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Autori principali: Engelsberg, M., Barros Jr, Wilson
Natura: Preprint
Pubblicazione: 2026
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author Engelsberg, M.
Barros Jr, Wilson
author_facet Engelsberg, M.
Barros Jr, Wilson
contents F$^{19}$ nuclear magnetic resonance free induction decay (FID) data are used to verify the predictions of a universal growth hypothesis for the Lanczos coefficients proposed by Parker et al. Our results strongly support this hypothesis and permit to calculate values of the growth parameter $α$ for three crystal orientations. For the magnetic field parallel the [100] crystal axis, we found $α=3.161 \times 10^{4} sec^{-1}$. The special experimental conditions required for the observability of a singularity in the analytic continuation of the FID, which from the experimental data was found to be of branch-point type, are discussed.
format Preprint
id arxiv_https___arxiv_org_abs_2604_09362
institution arXiv
publishDate 2026
record_format arxiv
spellingShingle Experimental Verification of a Universal Operator Growth Hypothesis
Engelsberg, M.
Barros Jr, Wilson
Mesoscale and Nanoscale Physics
Materials Science
F$^{19}$ nuclear magnetic resonance free induction decay (FID) data are used to verify the predictions of a universal growth hypothesis for the Lanczos coefficients proposed by Parker et al. Our results strongly support this hypothesis and permit to calculate values of the growth parameter $α$ for three crystal orientations. For the magnetic field parallel the [100] crystal axis, we found $α=3.161 \times 10^{4} sec^{-1}$. The special experimental conditions required for the observability of a singularity in the analytic continuation of the FID, which from the experimental data was found to be of branch-point type, are discussed.
title Experimental Verification of a Universal Operator Growth Hypothesis
topic Mesoscale and Nanoscale Physics
Materials Science
url https://arxiv.org/abs/2604.09362