Work

Quantum phases of two-dimensional Z2 gauge theory coupled to single-component fermion matter

Year: 2022

Type: article

Abstract: Gauge theories are ubiquitous in contemporary physics. Here, the authors investigate the many-body phase diagram of a model where dynamical discrete Ising gauge fields mediate interactions between single-component fermionic matter. Such a system remained intractable for years, due to the lack of sign-problem-free Monte-Carlo simulations. With the help of a combination of analytical and state-of-the-art numerical tensor-network-based methods, the authors uncover the salient features of an intricate quantum phase diagram and reveal surprising aspects of quantum constrained dynamics. The recent advances in cold-atoms-based setups might soon allow experimental explorations of this model.

Source: Physical review. B./Physical review. B

DOI: 10.1103/physrevb.105.075132

Authors: Umberto Borla, Bhilahari Jeevanesan, Frank Pollmann, Sergej Moroz

Institutions: Munich Center for Quantum Science and Technology, Technical University of Munich, Karlstad University

Language: Latvian

Topic: Quantum many-body systems

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Deutsche Forschungsgemeinschaft, European Research Council, Horizon 2020

Awards: G3339190985, G4710139657, G4873406484