Lie-Equivariant Quantum Graph Neural Networks

Jogi Suda Neto, Roy Thomas Forestano, Sergei Gleyzer, Kyoungchul Kong, Konstantin Matchev, Katia Matcheva

Keywords: quantum machine learning, equivariance, invariance, classification, particle physics, Lorentz symmetry

TL;DR: We build a Lorentz-equivariant quantum GNN for quark-gluon jet discrimination.

Abstract: Discovering new phenomena at the Large Hadron Collider (LHC) involves the identification of rare signals over conventional backgrounds. Thus binary classification tasks are ubiquitous in analyses of the vast amounts of LHC data. We develop a Lie-Equivariant Quantum Graph Neural Network (Lie-EQGNN), a quantum model that is not only data efficient, but also has symmetry-preserving properties. Since Lorentz group equivariance has been shown to be beneficial for jet tagging, we build a Lorentz-equivariant quantum GNN for quark-gluon jet discrimination and show that its performance is on par with its classical state-of-the-art counterpart LorentzNet, making it a viable alternative to the conventional computing paradigm.

Submission Number: 36