Quantum-inspired event reconstruction with Tensor Networks: Matrix Product States

Araz, Jack Y.; Spannowsky, Michael

Abstract

Tensor Networks are non-trivial representations of high-dimensional tensors, originally designed to describe quantum many-body systems. We show that Tensor Networks are ideal vehicles to connect quantum mechanical concepts to machine learning techniques, thereby facilitating an improved interpretability of neural networks. This study presents the discrimination of top quark signal over QCD background processes using a Matrix Product State classifier. We show that entanglement entropy can be used to interpret what a network learns, which can be used to reduce the complexity of the network and feature space without loss of generality or performance. For the optimisation of the network, we compare the Density Matrix Renormalization Group (DMRG) algorithm to stochastic gradient descent (SGD) and propose a joined training algorithm to harness the explainability of DMRG with the efficiency of SGD.

Citation

Araz, J. Y., & Spannowsky, M. (2021). Quantum-inspired event reconstruction with Tensor Networks: Matrix Product States. Journal of High Energy Physics, 2021(8), https://doi.org/10.1007/jhep08%282021%29112

• Journal Article Type: Article
• Acceptance Date: Aug 1, 2021
• Online Publication Date: Aug 23, 2021
• Publication Date: 2021
• Deposit Date: Nov 9, 2021
• Publicly Available Date: Nov 9, 2021
• Journal: Journal of High Energy Physics
• Print ISSN: 1126-6708
• Electronic ISSN: 1029-8479
• Publisher: Scuola Internazionale Superiore di Studi Avanzati (SISSA)
• Peer Reviewed: Peer Reviewed
• Volume: 2021
• Issue: 8
• DOI: https://doi.org/10.1007/jhep08%282021%29112
• Public URL: https://durham-repository.worktribe.com/output/1223991