1k citations · 11.3k across the 82 of their papers we have counts for
23 papers · 1 filter
Brownian ratchets and pumps universally simulate many-body active dynamics
Charles Stahl, Ethan Lake, Vedika Khemani
Active systems can exhibit a broad range of phenomena forbidden in equilibrium. Their dynamics are often specified by abstract local update rules, and it is generally unclear when…
Slow mixing and emergent one-form symmetries in three-dimensional gauge theory
Charles Stahl, Benedikt Placke, Vedika Khemani +1
Symmetry-breaking order at low temperatures is often accompanied by slow relaxation dynamics, due to diverging free-energy barriers arising from interfaces between different ordere…
Expansion creates spin-glass order in finite-connectivity models: a rigorous and intuitive approach from the theory of LDPC codes
Benedikt Placke, Grace M. Sommers, Nikolas P. Breuckmann +2
Complex free-energy landscapes with many local minima separated by large barriers are believed to underlie glassy behavior across diverse physical systems. This is the heuristic pi…
Quantum chaos at finite temperature in local spin Hamiltonians
Christopher M. Langlett, Cheryne Jonay, Vedika Khemani +1
Understanding the emergence of chaos in many-body quantum systems away from semi-classical limits, particularly in spatially local interacting spin Hamiltonians, has been a long-st…
Absorbing state transitions with long-range annihilation
Nicholas O'Dea, Sayak Bhattacharjee, Sarang Gopalakrishnan +1
We introduce a family of classical stochastic processes describing diffusive particles undergoing branching and long-range annihilation in the presence of a parity constraint. The…
Prethermal stability of eigenstates under high frequency Floquet driving
Nicholas O'Dea, Fiona Burnell, Anushya Chandran +1
Systems subject to high-frequency driving exhibit Floquet prethermalization, that is, they heat exponentially slowly on a time scale that is large in the drive frequency, $τ_{\rm h…
Quantifying quantum chaos through microcanonical distributions of entanglement
Joaquin F. Rodriguez-Nieva, Cheryne Jonay, Vedika Khemani
A characteristic feature of "quantum chaotic" systems is that their eigenspectra and eigenstates display universal statistical properties described by random matrix theory (RMT). H…
Entanglement and Absorbing-State Transitions in Interactive Quantum Dynamics
Nicholas O'Dea, Alan Morningstar, Sarang Gopalakrishnan +1
Nascent quantum computers motivate the exploration of quantum many-body systems in nontraditional scenarios. For example, it has become natural to explore the dynamics of systems e…
Universality classes of thermalization for mesoscopic Floquet systems
Alan Morningstar, David A. Huse, Vedika Khemani
We identify several phases of thermalization that describe regimes of behavior in isolated, periodically driven (Floquet), mesoscopic quantum chaotic systems. We also identify a ne…
Distinct universality classes of diffusive transport from full counting statistics
Sarang Gopalakrishnan, Alan Morningstar, Romain Vasseur +1
The hydrodynamic transport of local conserved densities furnishes an effective coarse-grained description of the dynamics of a many-body quantum system. However, the full quantum d…
From tunnels to towers: quantum scars from Lie Algebras and q-deformed Lie Algebras
Nicholas O'Dea, Fiona Burnell, Anushya Chandran +1
We present a general symmetry-based framework for obtaining many-body Hamiltonians with scarred eigenstates that do not obey the eigenstate thermalization hypothesis. Our models ar…
Kinetically constrained freezing transition in a dipole-conserving system
Alan Morningstar, Vedika Khemani, David A. Huse
We study a stochastic lattice gas of particles in one dimension with strictly finite-range interactions that respect the fracton-like conservation laws of total charge and dipole m…
Localization from Hilbert space shattering: from theory to physical realizations
Vedika Khemani, Michael Hermele, Rahul M. Nandkishore
We show how a finite number of conservation laws can globally `shatter' Hilbert space into exponentially many dynamically disconnected subsectors, leading to an unexpected dynamics…
Asymmetric butterfly velocities in 2-local Hamiltonians
Yong-Liang Zhang, Vedika Khemani
The speed of information propagation is finite in quantum systems with local interactions. In many such systems, local operators spread ballistically in time and can be characteriz…
Local constraints can globally shatter Hilbert space: a new route to quantum information protection
Vedika Khemani, Rahul Nandkishore
We show how local constraints can globally "shatter" Hilbert space into subsectors, leading to an unexpected dynamics with features reminiscent of both many body localization and q…
Asymmetric butterfly velocities in Hamiltonian and circuit models
Charles Stahl, Vedika Khemani, David A. Huse
The butterfly velocity has been proposed as a characteristic velocity for information propagation in local systems. It can be measured by the ballistic spreading of local ope…
Hydrodynamics of operator spreading and quasiparticle diffusion in interacting integrable systems
Sarang Gopalakrishnan, David A. Huse, Vedika Khemani +1
We address the hydrodynamics of operator spreading in interacting integrable lattice models. In these models, operators spread through the ballistic propagation of quasiparticles,…
Velocity-dependent Lyapunov exponents in many-body quantum, semi-classical, and classical chaos
Vedika Khemani, David A. Huse, Adam Nahum
The exponential growth or decay with time of the out-of-time-order commutator (OTOC) is one widely used diagnostic of many-body chaos in spatially-extended systems. In studies of m…
Operator spreading and the emergence of dissipative hydrodynamics under unitary evolution with conservation laws
Vedika Khemani, Ashvin Vishwanath, D. A. Huse
We study the scrambling of local quantum information in chaotic many-body systems in the presence of a locally conserved quantity like charge or energy that moves diffusively. The…
Obtaining highly excited eigenstates of the localized XX chain via DMRG-X
Trithep Devakul, Vedika Khemani, Frank Pollmann +2
We benchmark a variant of the recently introduced DMRG-X algorithm against exact results for the localized random field XX chain. We find that the eigenstates obtained via DMRG-X e…
Defining Time Crystals via Representation Theory
Vedika Khemani, C. W. von Keyserlingk, S. L. Sondhi
Time crystals are proposed states of matter which spontaneously break time translation symmetry. There is no settled definition of such states. We offer a new definition which foll…
Eigenstate Thermalization and Representative States on Subsystems
Vedika Khemani, Anushya Chandran, Hyungwon Kim +1
We consider a quantum system A U B made up of degrees of freedom that can be partitioned into spatially disjoint regions A and B. When the full system is in a pure state in which r…
A Bionic Coulomb Phase on the Pyrochlore Lattice
V. Khemani, R. Moessner, S. A. Parameswaran +1
A class of three dimensional classical lattice systems with macroscopic ground state degeneracies, most famously the spin ice system, are known to exhibit "Coulomb" phases wherein…