45 citations · 165 across the 19 of their papers we have counts for
20 papers
Long-lived local coherences at high temperature from frozen domain walls
Sarang Gopalakrishnan, Romain Vasseur
Local coherences between distinct charge sectors--measured by the single-particle Green's function or the transverse spin autocorrelation function--do not overlap with hydrodynamic…
Distinguishability Transitions from Global Quantum Snapshots
Catherine McCarthy, Sarang Gopalakrishnan, Romain Vasseur
Quantum states generated by generic time evolution are locally featureless: local measurements return random outcomes that are identical for all states. However, global snapshots i…
Strong-to-Weak Symmetry Breaking in Open Quantum Systems: From Discrete Particles to Continuum Hydrodynamics
Jacob Hauser, Kaixiang Su, Hyunsoo Ha +6
We explore the onset of spontaneous strong-to-weak symmetry breaking (SW-SSB) under U(1)-symmetric (i.e., charge-conserving) open-system dynamics. We define this phenomenon for qua…
Anomalous diffusion and singular transport from hydrodynamic recoupling
Ewan McCulloch, Romain Vasseur, Sarang Gopalakrishnan
In charge neutral fluids, such as the Dirac fluid in graphene at the Dirac point, charge transport remains diffusive despite the presence of ballistically propagating sound waves:…
Monitored Fluctuating Hydrodynamics
Sarang Gopalakrishnan, Ewan McCulloch, Romain Vasseur
We introduce a hydrodynamic framework for describing monitored classical stochastic processes. We study the conditional ensembles for these monitored processes -- i.e., we compute…
Mixed-state learnability transitions in monitored noisy quantum dynamics
Hansveer Singh, Romain Vasseur, Andrew C. Potter +1
We consider learnability transitions in monitored quantum systems that undergo noisy evolution, subject to a global strong symmetry -- i.e., in addition to the measuring apparatus,…
Superdiffusive transport in chaotic quantum systems with nodal interactions
Yu-Peng Wang, Jie Ren, Sarang Gopalakrishnan +1
We introduce a class of interacting fermionic quantum models in dimensions with nodal interactions that exhibit superdiffusive transport. We establish non-perturbatively that t…
Long-time divergences in the nonlinear response of gapped one-dimensional many-particle systems
M. Fava, S. Gopalakrishnan, R. Vasseur +2
We consider one dimensional many-particle systems that exhibit kinematically protected single-particle excitations over their ground states. We show that momentum and time-resolved…
Ballistic Modes as a Source of Anomalous Charge Noise
Ewan McCulloch, Romain Vasseur, Sarang Gopalakrishnan
Steady-state currents generically occur both in systems with continuous translation invariance and in nonequilibrium settings with particle drift. In either case, thermal fluctuati…
Subdiffusive transport in the Fredkin dynamical universality class
Catherine McCarthy, Hansveer Singh, Sarang Gopalakrishnan +1
We identify a pseudolocal conserved charge in the Fredkin and Motzkin quantum spin chains and explore its consequences for the hydrodynamics of systems with Fredkin- or Motzkin-typ…
Partial yet definite emergence of the Kardar-Parisi-Zhang class in isotropic spin chains
Kazumasa A. Takeuchi, Kazuaki Takasan, Ofer Busani +3
Integrable spin chains with a continuous non-Abelian symmetry, such as the one-dimensional isotropic Heisenberg model, show superdiffusive transport with little theoretical underst…
Emergence of Navier-Stokes hydrodynamics in chaotic quantum circuits
Hansveer Singh, Ewan McCulloch, Sarang Gopalakrishnan +1
We construct an ensemble of two-dimensional nonintegrable quantum circuits that are chaotic but have a conserved particle current, and thus a finite Drude weight. The long-waveleng…
Effective Luttinger parameter and Kane-Fisher effect in quasiperiodic systems
T. J. Vongkovit, Hansveer Singh, Romain Vasseur +1
The ground states of interacting one-dimensional metals are generically Luttinger liquids. Luttinger liquid theory is usually considered for translation invariant systems. The Lutt…
Slow crossover from superdiffusion to diffusion in isotropic spin chains
Catherine McCarthy, Sarang Gopalakrishnan, Romain Vasseur
Finite-temperature spin transport in integrable isotropic spin chains (i.e., spin chains with continuous nonabelian symmetries) is known to be superdiffusive, with anomalous transp…
Non-Gaussian diffusive fluctuations in Dirac fluids
Sarang Gopalakrishnan, Ewan McCulloch, Romain Vasseur
Dirac fluids - interacting systems obeying particle-hole symmetry and Lorentz invariance - are among the simplest hydrodynamic systems; they have also been studied as effective des…
Universal structure of measurement-induced information in many-body ground states
Zihan Cheng, Rui Wen, Sarang Gopalakrishnan +2
Unlike unitary dynamics, measurements of a subsystem can induce long-range entanglement via quantum teleportation. The amount of measurement-induced entanglement or mutual informat…
Generalized hydrodynamics: a perspective
Benjamin Doyon, Sarang Gopalakrishnan, Frederik Møller +2
Conventional hydrodynamics describes systems with few long-lived excitations. In one dimension, however, many experimentally relevant systems feature a large number of long-lived e…
Observing quantum measurement collapse as a learnability phase transition
Utkarsh Agrawal, Javier Lopez-Piqueres, Romain Vasseur +2
The mechanism by which an effective macroscopic description of quantum measurement in terms of discrete, probabilistic collapse events emerges from the reversible microscopic dynam…
Extended critical phase in quasiperiodic quantum Hall systems
Jonas F Karcher, Romain Vasseur, Sarang Gopalakrishnan
We consider the effects of quasiperiodic spatial modulation on the quantum Hall plateau transition, by analyzing the Chalker-Coddington network model for the integer quantum Hall t…
Boundary transfer matrix spectrum of measurement-induced transitions
Abhishek Kumar, Kemal Aziz, Ahana Chakraborty +4
Measurement-induced phase transitions (MIPTs) are known to be described by non-unitary conformal field theories (CFTs) whose precise nature remains unknown. Most physical quantitie…