Out-of-time-order correlations and the fine structure of eigenstate thermalization

Autor: Mark T. Mitchison, John Goold, Marlon Brenes, Alessandro Silva, Silvia Pappalardi

Publikováno v: Phys.Rev.E
Phys.Rev.E, 2021, 104 (3), pp.034120. ⟨10.1103/PhysRevE.104.034120⟩

Out-of-time-order correlators (OTOCs) have become established as a tool to characterise quantum information dynamics and thermalisation in interacting quantum many-body systems. It was recently argued that the expected exponential growth of the OTOC

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3436a30370b6f48f73b089d10fe00f02
https://doi.org/10.1103/physreve.104.034120

Eigenstate Thermalization in a Locally Perturbed Integrable System

Autor: Tyler LeBlond, Marlon Brenes, John Goold, Marcos Rigol

Publikováno v: Physical Review Letters

Eigenstate thermalization is widely accepted as the mechanism behind thermalization in generic isolated quantum systems. Using the example of a single magnetic defect embedded in the integrable spin-1/2 $XXZ$ chain, we show that locally perturbing an

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::57bd7ec8030b3f139abe5d569e68ad15
http://arxiv.org/abs/2004.04755

Tensor-network method to simulate strongly interacting quantum thermal machines

Autor: Stephen R. Clark, Marlon Brenes, Mark T. Mitchison, Archak Purkayastha, John Goold, J. J. Mendoza-Arenas

Publikováno v: Physical Review X, Vol 10, Iss 3, p 031040 (2020)
Physical Review X
Brenes, M, Mendoza-Arenas, J J, Purkayastha, A, Mitchison, M T, Clark, S R & Goold, J 2020, ' Tensor-network method to simulate strongly interacting quantum thermal machines ', Physical Review X, vol. 10, 031040 . https://doi.org/10.1103/PhysRevX.10.031040

We present a methodology to simulate the quantum thermodynamics of thermal machines which are built from an interacting working medium in contact with fermionic reservoirs at fixed temperature and chemical potential. Our method works at finite temper

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Many-Body Localization Dynamics from Gauge Invariance

Autor: Markus Heyl, Marlon Brenes, Marcello Dalmonte, Antonello Scardicchio

Publikováno v: Physical Review Letters

We show how lattice gauge theories can display many-body localization dynamics in the absence of disorder. Our starting point is the observation that, for some generic translationally invariant states, Gauss law effectively induces a dynamics which c

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https://doi.org/10.1103/physrevlett.120.030601

Low-frequency behavior of off-diagonal matrix elements in the integrable XXZ chain and in a locally perturbed quantum-chaotic XXZ chain

Autor: Marcos Rigol, Marlon Brenes, John Goold

Publikováno v: Physical Review B

We study the matrix elements of local operators in the eigenstates of the integrable XXZ chain and of the quantum-chaotic model obtained by locally perturbing the XXZ chain with a magnetic impurity. We show that, at frequencies that are polynomially

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