Anomalous transport from hot quasiparticles in interacting spin chains

Sarang Gopalakrishnan, Romain Vasseur

Research output: Contribution to journalReview articlepeer-review

8 Scopus citations


Many experimentally relevant quantum spin chains are approximately integrable, and support long-lived quasiparticle excitations. A canonical example of integrable model of quantum magnetism is the XXZ spin chain, for which energy spreads ballistically, but, surprisingly, spin transport can be diffusive or superdiffusive. We review the transport properties of this model using an intuitive quasiparticle picture that relies on the recently introduced framework of generalized hydrodynamics. We discuss how anomalous linear response properties emerge from hierarchies of quasiparticles both in integrable and near-integrable limits, with an emphasis on the role of hydrodynamic fluctuations. We also comment on recent developments including non-linear response, full-counting statistics and far-from-equilibrium transport. We provide an overview of recent numerical and experimental results on transport in XXZ spin chains.

Original languageEnglish (US)
Article number036502
JournalReports on Progress in Physics
Issue number3
StatePublished - Mar 2023
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


  • anomalous
  • quantum spin chains
  • quasiparticles
  • transport


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