500 citations · 7k across the 107 of their papers we have counts for
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Boundary Criticality in the 2d Random Quantum Ising Model
Gaurav Tenkila, Romain Vasseur, Andrew C. Potter
The edge of a quantum critical system can exhibit multiple distinct types of boundary criticality. We use a numerical real-space renormalization group (RSRG) to study the boundary…
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…
Operator front broadening in chaotic and integrable quantum chains
Javier Lopez-Piqueres, Brayden Ware, Sarang Gopalakrishnan +1
Operator spreading under unitary time evolution has attracted a lot of attention recently, as a way to probe many-body quantum chaos. While quantities such as out-of-time-ordered c…
Hydrodynamic non-linear response of interacting integrable systems
Michele Fava, Sounak Biswas, Sarang Gopalakrishnan +2
We develop a formalism for computing the non-linear response of interacting integrable systems. Our results are asymptotically exact in the hydrodynamic limit where perturbing fiel…
Topological edge modes without symmetry in quasiperiodically driven spin chains
Aaron J. Friedman, Brayden Ware, Romain Vasseur +1
We construct an example of a 1 quasiperiodically driven spin chain whose edge states can coherently store quantum information, protected by a combination of localization, dynami…
Superuniversality from disorder at two-dimensional topological phase transitions
Byungmin Kang, S. A. Parameswaran, Andrew C. Potter +2
We investigate the effects of quenched randomness on topological quantum phase transitions in strongly interacting two-dimensional systems. We focus first on transitions driven by…
Topological and symmetry-enriched random quantum critical points
Carlos M. Duque, Hong-Ye Hu, Yi-Zhuang You +3
We study how symmetry can enrich strong-randomness quantum critical points and phases, and lead to robust topological edge modes coexisting with critical bulk fluctuations. These a…
Distinguishing localization from chaos: challenges in finite-size systems
D. A. Abanin, J. H. Bardarson, G. De Tomasi +7
We re-examine attempts to study the many-body localization transition using measures that are physically natural on the ergodic/quantum chaotic regime of the phase diagram. Using s…
Topologically-Protected Long Edge Coherence Times in Symmetry-Broken Phases
Daniel E. Parker, Romain Vasseur, Thomas Scaffidi
We argue that symmetry-broken phases proximate in phase space to symmetry-protected topological phases can exhibit dynamical signatures of topological physics. This dynamical, symm…
Topological Luttinger Liquids from Decorated Domain Walls
Daniel E Parker, Thomas Scaffidi, Romain Vasseur
We introduce a systematic construction of a gapless symmetry protected topological phase in one dimension by "decorating" the domain walls of Luttinger liquids. The resulting stron…
Gapless Symmetry Protected Topological Order
Thomas Scaffidi, Daniel E. Parker, Romain Vasseur
We introduce exactly solvable gapless quantum systems in dimensions that support symmetry protected topological (SPT) edge modes. Our construction leads to long-range entangled…
Universal Entanglement Dynamics following a Local Quench
Romain Vasseur, Hubert Saleur
We study the time dependence of the entanglement between two quantum wires after suddenly connecting them via tunneling through an impurity. The result at large times is given by t…
Floquet Dynamics of Boundary-Driven Systems at Criticality
William Berdanier, Michael Kolodrubetz, Romain Vasseur +1
A quantum critical system described at low energy by a conformal field theory (CFT) and subjected to a time-periodic boundary drive displays multiple dynamical regimes depending on…
Nonequilibrium quantum dynamics and transport: from integrability to many-body localization
Romain Vasseur, Joel E. Moore
We review the non-equilibrium dynamics of many-body quantum systems after a quantum quench with spatial inhomogeneities, either in the Hamiltonian or in the initial state. We focus…
Expansion potentials for exact far-from-equilibrium spreading of particles and energy
Romain Vasseur, Christoph Karrasch, Joel E. Moore
The rates at which energy and particle densities move to equalize arbitrarily large temperature and chemical potential differences in an isolated quantum system have an emergent th…
Exact overlaps in the Kondo problem
Sergei L. Lukyanov, Hubert Saleur, Jesper L. Jacobsen +1
It is well known that the ground states of a Fermi liquid with and without a single Kondo impurity have an overlap which decays as a power law of the system size, expressing the An…
Quantum revivals and many-body localization
R. Vasseur, S. A. Parameswaran, J. E. Moore
We show that the magnetization of a single `qubit' spin weakly coupled to an otherwise isolated disordered spin chain exhibits periodic revivals in the localized regime, and retain…
Universal quench dynamics of interacting quantum impurity systems
D. M. Kennes, V. Meden, R. Vasseur
The equilibrium physics of quantum impurities frequently involves a universal crossover from weak to strong reservoir-impurity coupling, characterized by single-parameter scaling a…
Universal entanglement crossover of coupled quantum wires
Romain Vasseur, Jesper Lykke Jacobsen, Hubert Saleur
We consider the entanglement between two one-dimensional quantum wires (Luttinger Liquids) coupled by tunneling through a quantum impurity. The physics of the system involves a cro…
Entanglement in quantum impurity problems is non perturbative
Hubert Saleur, Peter Schmitteckert, Romain Vasseur
We study the entanglement entropy of a region of length 2L with the remainder of an infinite one dimensional gapless quantum system in the case where the region is centered on a qu…
Crossover physics in the non-equilibrium dynamics of quenched quantum impurity systems
Romain Vasseur, Kien Trinh, Stephan Haas +1
A general framework is proposed to tackle analytically local quantum quenches in integrable impurity systems, combining a mapping onto a boundary problem with the form factor appro…