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Regensburg 2019 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 53: Poster Quantum Systems

DY 53.10: Poster

Thursday, April 4, 2019, 15:00–18:00, Poster B2

Equilibration and thermalization in the XXZ model — •Philipp Jaeger1,2, Andreas Klümper2, and Jesko Sirker11University of Manitoba, Department of Physics and Astronomy, Winnipeg, MB, Canada — 2Bergische Universität Wuppertal, Fachbereich C - Fachgruppe Physik, Wuppertal, Germany

The quantum XXZ model is an integrable lattice model, hence exact solutions are available via Bethe ansatz (BA). For many ground-state properties or correlation functions, explicit expressions are available. Expectation values of observables at late times after a quench can be calculated for example using the generalized Gibbs ensemble (GGE) formalism. However, particular dynamical correlation functions (DCF) are notoriously hard to calculate from BA, and perturbations of the XXZ model can not be treated directly. Using numerics, it is possible both to obtain DCF relatively easy and to include perturbations. Here, we present numerical results obtained employing the light-cone renormalization group algorithm.

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