Magic of discrete lattice gauge theories

• URL: http://arxiv.org/abs/2601.15842v1
• Date: Thu, 22 Jan 2026 10:47:34 GMT
• Title: Magic of discrete lattice gauge theories
• Authors: Gianluca Esposito, Simone Cepollaro, Luigi Cappiello, Alioscia Hamma,
• Abstract summary: We show that enforcing gauge constraints for $mathbbZ_l$ Lattice Gauge Theory (LGT) has no cost in terms of this resource.<n>We discuss the relation between non-abelianity of the gauge group with the average non-stabilizerness of the gauge invariant Hilbert space.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Simulation of quantum field theories and fundamental interactions are one of the most challenging tasks in modern particle physics. Classical computers generally fail to reproduce accurate results when it comes to strongly coupled theories such as QCD. Recent developments in quantum technologies open up the possibility of simulating such physical regimes by using quantum computers. In this paper, we study the quantum resource related to the simulability of a quantum theory, i.e. non-stabilizerness for Lattice Gauge Theory (LGT) with discrete symmetry gauge groups. We show that enforcing gauge constraints for $\mathbb{Z}_l$ LGTs has no cost in terms of this resource and discuss the relation between non-abelianity of the gauge group with the average non-stabilizerness of the gauge invariant Hilbert space.

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