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Triviality of quantum trajectories close to a directed percolation transition
Lorenzo Piroli, Yaodong Li, Romain Vasseur +1
We study quantum circuits consisting of unitary gates, projective measurements, and control operations that steer the system towards a pure absorbing state. Two types of phase tran…
Non-linear fluctuating hydrodynamics for KPZ scaling in isotropic spin chains
Jacopo De Nardis, Sarang Gopalakrishnan, Romain Vasseur
Finite temperature spin transport in integrable isotropic spin chains is known to be superdiffusive, with dynamical spin correlations that are conjectured to fall into the Kardar-P…
Hydrodynamic relaxation of spin helices
Guillaume Cecile, Sarang Gopalakrishnan, Romain Vasseur +1
Motivated by recent cold atom experiments, we study the relaxation of spin helices in quantum XXZ spin chains. The experimentally observed relaxation of spin helices follows scalin…
Integrability breaking from backscattering
Javier Lopez-Piqueres, Romain Vasseur
We analyze the onset of diffusive hydrodynamics in the one-dimensional hard-rod gas subject to stochastic backscattering. While this perturbation breaks integrability and leads to…
Anomalous transport from hot quasiparticles in interacting spin chains
Sarang Gopalakrishnan, Romain Vasseur
Many experimentally relevant quantum spin chains are approximately integrable, and support long-lived quasiparticle excitations. A canonical example of integrable model of quantum…
Divergent nonlinear response from quasiparticle interactions
Michele Fava, Sarang Gopalakrishnan, Romain Vasseur +2
We demonstrate that nonlinear response functions in many-body systems carry a sharp signature of interactions between gapped low-energy quasiparticles. Such interactions are challe…