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First-principles simulations of 1+1D quantum field theories at θ=π and spin chains.

Sulejmanpasic, Tin and Göschl, Daniel and Gattringer, Christof (2020) 'First-principles simulations of 1+1D quantum field theories at θ=π and spin chains.', Physical review letters., 125 (20). p. 201602.

Abstract

We present a lattice study of a 2-flavor U(1) gauge-Higgs model quantum field theory with a topological term at θ = π. Such studies are prohibitively costly in the standard lattice formulation due to the sign problem. Using a novel discretization of the model, along with an exact lattice dualization, we overcome the sign problem and reliably simulate such systems. Our work provides the first ab initio demonstration that the model is in the spin-chain universality class, and demonstrates the power of the new approach to U(1) gauge theories.

Item Type:Article
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Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1103/PhysRevLett.125.201602
Publisher statement:Reprinted with permission from the American Physical Society: Sulejmanpasic, Tin, Göschl, Daniel & Gattringer, Christof (2020). First-Principles Simulations of 1+1D Quantum Field Theories at θ=π and Spin Chains. Physical Review Letters 125(20): 201602 © 2020 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.
Date accepted:13 October 2020
Date deposited:26 November 2020
Date of first online publication:12 November 2020
Date first made open access:26 November 2020

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