First-Principles Simulations of 1+1D Quantum Field Theories at θ=π and Spin Chains

Sulejmanpasic, Tin; Göschl, Daniel; Gattringer, Christof

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.

Citation

Sulejmanpasic, T., Göschl, D., & Gattringer, C. (2020). First-Principles Simulations of 1+1D Quantum Field Theories at θ=π and Spin Chains. Physical Review Letters, 125(20), Article 201602. https://doi.org/10.1103/physrevlett.125.201602

• Journal Article Type: Article
• Acceptance Date: Oct 13, 2020
• Online Publication Date: Nov 12, 2020
• Publication Date: 2020-11
• Deposit Date: Nov 26, 2020
• Publicly Available Date: Nov 26, 2020
• Journal: Physical Review Letters
• Print ISSN: 0031-9007
• Electronic ISSN: 1079-7114
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 125
• Issue: 20
• Article Number: 201602
• DOI: https://doi.org/10.1103/physrevlett.125.201602
• Public URL: https://durham-repository.worktribe.com/output/1284718