Tunable Superdiffusion in Integrable Spin Chains Using Correlated Initial States

Hansveer Singh, Michael H. Kolodrubetz, Sarang Gopalakrishnan, Romain Vasseur

Research output: Contribution to journalArticlepeer-review

Abstract

Although integrable spin chains host only ballistically propagating particles, they can still feature diffusive charge transfer. This diffusive charge transfer originates from quasiparticle charge fluctuations inherited from the initial state's magnetization Gaussian fluctuations. We show that ensembles of initial states with quasi-long-range correlations lead to superdiffusive charge transfer with a tunable dynamical exponent. We substantiate our prediction with numerical simulations and discuss how finite time and finite size effects might cause deviations.

Original languageEnglish (US)
Article number176303
JournalPhysical review letters
Volume132
Issue number17
DOIs
StatePublished - Apr 26 2024
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy

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