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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…
Mott, Floquet, and the response of periodically driven Anderson insulators
Dillon T. Liu, J. T. Chalker, Vedika Khemani +1
We consider periodically driven Anderson insulators. The short time behavior for weak, monochromatic, uniform electric fields is given by linear response theory and was famously de…
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,…
Signatures of integrability in the dynamics of Rydberg-blockaded chains
Vedika Khemani, Chris R. Laumann, Anushya Chandran
A recent experiment on a 51-atom Rydberg blockaded chain observed anomalously long-lived temporal oscillations of local observables after quenching from an antiferromagnetic initia…
Probing entanglement in a many-body-localized system
Alexander Lukin, Matthew Rispoli, Robert Schittko +6
An interacting quantum system that is subject to disorder may cease to thermalize due to localization of its constituents, thereby marking the breakdown of thermodynamics. The key…
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…