250 citations · 3.9k across the 99 of their papers we have counts for
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Operator Growth in Disordered Spin Chains: Indications for the Absence of Many-Body Localization
A. Weisse, R. Gerstner, J. Sirker
We consider the spreading of a local operator in one-dimensional systems with Hamiltonian by calculating the -fold commutator . We derive bounds for…
Comment on "Resonance-induced growth of number entropy in strongly disordered systems"
Maximilian Kiefer-Emmanouilidis, Razmik Unanyan, Michael Fleischhauer +1
We comment on the recent paper by Ghosh and Žnidarič (Phys. Rev. B 105, 144203 (2022)) which studies the growth of the number entropy in the Heisenberg model with random magn…
Particle fluctuations and the failure of simple effective models for many-body localized phases
Maximilian Kiefer-Emmanouilidis, Razmik Unanyan, Michael Fleischhauer +1
We investigate and compare the particle number fluctuations in the putative many-body localized (MBL) phase of a spinless fermion model with potential disorder and nearest-neighbor…
Unlimited growth of particle fluctuations in many-body localized phases
M. Kiefer-Emmanouilidis, R. Unanyan, M. Fleischhauer +1
We study quench dynamics in a t-V chain of spinless fermions (equivalent to the spin-1/2 Heisenberg chain) with strong potential disorder. For this prototypical model of many-body…
Entanglement dynamics in the three-dimensional Anderson model
Y. Zhao, D. Feng, Y. Hu +2
We numerically study the entanglement dynamics of free fermions on a cubic lattice with potential disorder following a quantum quench. We focus, in particular, on the metal-insulat…
Absence of true localization in many-body localized phases
Maximilian Kiefer-Emmanouilidis, Razmik Unanyan, Michael Fleischhauer +1
We have recently shown that the logarithmic growth of the entanglement entropy following a quantum quench in a many-body localized (MBL) phase is accompanied by a slow growth of th…
Evidence for unbounded growth of the number entropy in many-body localized phases
Maximilian Kiefer-Emmanouilidis, Razmik Unanyan, Michael Fleischhauer +1
We investigate the number entropy ---which characterizes particle-number fluctuations between subsystems---following a quench in one-dimensional interacting many-body systems…
Bounds on the entanglement entropy by the number entropy in non-interacting fermionic systems
Maximilian Kiefer-Emmanouilidis, Razmik Unanyan, Jesko Sirker +1
Entanglement in a pure state of a many-body system can be characterized by the Rényi entropies of the reduced density matrix of a subsystem.…
Logarithmic entanglement growth in two-dimensional disordered fermionic systems
Y. Zhao, J. Sirker
We investigate the growth of the entanglement entropy following global quenches in two-dimensional free fermion models with potential and bond disorder. For the…
Does a distinct quasi many-body localized phase exist? A numerical study of a translationally invariant system in the thermodynamic limit
J. Sirker
We consider a quench in an infinite spin ladder describing a system with two species of bosons in the limit of strong interactions. If the heavy bosonic species has infinite mass t…
Localization of fermions in coupled chains with identical disorder
Y. Zhao, S. Ahmed, J. Sirker
We study fermionic ladders with identical disorder along the leg direction. Following recent experiments we focus, in particular, on how an initial occupation imbalance evolves in…
Many-body localization in infinite chains
T. Enss, F. Andraschko, J. Sirker
We investigate the phase transition between an ergodic and a many-body localized phase in infinite anisotropic spin- Heisenberg chains with binary disorder. Starting from the…
Purification and many-body localization in cold atomic gases
F. Andraschko, T. Enss, J. Sirker
We propose to observe many-body localization in cold atomic gases by realizing a Bose-Hubbard chain with binary disorder and studying its non-equilibrium dynamics. In particular, w…