Anomalous transport from hot quasiparticles in interacting spin chains

S Gopalakrishnan, R Vasseur - Reports on Progress in Physics, 2023 - iopscience.iop.org
Many experimentally relevant quantum spin chains are approximately integrable, and
support long-lived quasiparticle excitations. A canonical example of integrable model of …

Superdiffusion in spin chains

VB Bulchandani, S Gopalakrishnan… - Journal of Statistical …, 2021 - iopscience.iop.org
This review summarizes recent advances in our understanding of anomalous transport in
spin chains, viewed through the lens of integrability. Numerical advances, based on tensor …

Quantum generalized hydrodynamics

P Ruggiero, P Calabrese, B Doyon, J Dubail - Physical review letters, 2020 - APS
Physical systems made of many interacting quantum particles can often be described by
Euler hydrodynamic equations in the limit of long wavelengths and low frequencies …

Diffusive hydrodynamics from integrability breaking

AJ Friedman, S Gopalakrishnan, R Vasseur - Physical Review B, 2020 - APS
We describe the crossover from generalized to conventional hydrodynamics in nearly
integrable systems. Integrable systems have infinitely many conserved quantities, which …

Superdiffusion from emergent classical solitons in quantum spin chains

J De Nardis, S Gopalakrishnan, E Ilievski, R Vasseur - Physical review letters, 2020 - APS
Finite-temperature spin transport in the quantum Heisenberg spin chain is known to be
superdiffusive, and has been conjectured to lie in the Kardar-Parisi-Zhang (KPZ) universality …

Generalized hydrodynamics with dephasing noise

A Bastianello, J De Nardis, A De Luca - Physical Review B, 2020 - APS
We consider the out-of-equilibrium dynamics of an interacting integrable system in the
presence of an external dephasing noise. In the limit of large spatial correlation of the noise …

Anomalous relaxation and the high-temperature structure factor of XXZ spin chains

S Gopalakrishnan, R Vasseur… - Proceedings of the …, 2019 - National Acad Sciences
We compute the spin-structure factor of XXZ spin chains in the Heisenberg and gapped
(Ising) regimes in the high-temperature limit for nonzero magnetization, within the framework …

Locally quasi-stationary states in noninteracting spin chains

M Fagotti - SciPost Physics, 2020 - scipost.org
Locally quasi-stationary states (LQSS) were introduced as inhomogeneous generalisations
of stationary states in integrable systems. Roughly speaking, LQSSs look like stationary …

Anomalous low-frequency conductivity in easy-plane XXZ spin chains

U Agrawal, S Gopalakrishnan, R Vasseur, B Ware - Physical Review B, 2020 - APS
Using the framework of generalized hydrodynamics, we compute the low-frequency spin
conductivity σ (ω) of XXZ spin chains with easy-plane anisotropy. We find that for almost all …

Inhomogeneous conformal field theory out of equilibrium

P Moosavi - Annales Henri Poincaré, 2024 - Springer
We study the non-equilibrium dynamics of conformal field theory (CFT) in 1+ 1 dimensions
with a smooth position-dependent velocity v (x) explicitly breaking translation invariance …