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Gaussian states for the variational study of (1+1)-dimensional lattice gauge models

arXiv
Authors: P. Sala, T. Shi, S. Kühn, M. C. Bañuls, E. Demler, J. I. Cirac

Year

2018

Paper ID

23408

Status

Preprint

Abstract Read

~2 min

Abstract Words

81

Citations

N/A

Abstract

We introduce a variational ansatz based on Gaussian states for (1+1)-dimensional lattice gauge models. To this end we identify a set of unitary transformations which decouple the gauge degrees of freedom from the matter fields. Using our ansatz, we study static aspects as well as real-time dynamics of string breaking in two (1+1)-dimensional theories, namely QED and two-color QCD. We show that our ansatz captures the relevant features and is in excellent agreement with data from numerical calculations with tensor networks.

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  • This paper contributes to the Quantum Simulation research area in the Quantum Articles archive.
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  • We introduce a variational ansatz based on Gaussian states for (1+1)-dimensional lattice gauge models.

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