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  From spin chains to real-time thermal field theory using tensor networks

Banuls, M. C., Heller, M. P., Jansen, K., Knaute, J., & Svensson, V. (in preparation). From spin chains to real-time thermal field theory using tensor networks.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-78D1-8 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-78D4-5
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1912.08836.pdf (Preprint), 3MB
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 Creators:
Banuls, Mari Carmen, Author
Heller, Michal P.1, Author              
Jansen, Karl, Author
Knaute, Johannes1, Author              
Svensson, Viktor, Author
Affiliations:
1Gravity, Quantum Fields and Information, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_2477692              

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Free keywords: High Energy Physics - Theory, hep-th, Condensed Matter, Statistical Mechanics, cond-mat.stat-mech, Condensed Matter, Strongly Correlated Electrons, cond-mat.str-el,High Energy Physics - Lattice, hep-lat,Quantum Physics, quant-ph
 Abstract: One of the most interesting directions in theoretical high-energy physics is understanding dynamical properties of collective states of quantum field theories. The most elementary tool in this quest are retarded equilibrium correlators governing the linear response theory. In the present letter we examine tensor networks as a way of determining them in a fully ab initio way in a class of (1+1)-dimensional quantum field theories arising as infra-red descriptions of quantum Ising chains. We show that, complemented with signal analysis using the Prony method, tensor networks calculations for intermediate times provide a powerful way to explore the structure of singularities of the correlator in the complex frequency plane.

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 Dates: 2019-12-18
 Publication Status: Not specified
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 Rev. Method: -
 Identifiers: arXiv: 1912.08836
URI: http://arxiv.org/abs/1912.08836
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