Work

(2+1)D quantum electrodynamics at finite density on a quantum computer

Year: 2026

Type: article

Abstract: In this paper, we explore (2+1)D quantum electrodynamics at finite density on a quantum computer, including two fermion flavors. Our method employs an established gauge-invariant Ansatz together with a quantum circuit structure that enforces Gauss’s law. As a proof of principle, we benchmark our simulation protocol on a small lattice system of 2×2, demonstrating the identification of density-induced level crossings in terms of the particle number of the fermion flavors. Classical simulations are used to obtain optimized variational parameters, which are then deployed in inference runs on IBM quantum hardware. We conclude by discussing hardware limitations and prospects for scaling this method to larger systems.

Source: DESY Publication Database (PUBDB) (Deutsches Elektronen-Synchrotron)

DOI: 10.3204/pubdb-2026-03172

Authors: Rosanowski, Emil Otis, Crippa, Arianna, Funcke, Lena, Itaborai, Paulo Vitor, Jansen, Karl, Singh, Simran

Institution: Deutsches Elektronen-Synchrotron DESY

Language: English

Topic: Quantum Computing Algorithms and Architecture

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W7223096748

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