Probing quantum entanglement using Higgs to ZZ* to 4 leptons at ATLAS

TL;DR

This paper investigates quantum entanglement in Higgs boson interactions at ATLAS by applying quantum tomography to extract the spin density matrix, revealing quantum properties of the HZZ* interaction.

Contribution

It introduces a novel application of quantum tomography to analyze entanglement in Higgs interactions using ATLAS data, providing new insights into quantum features of the HZZ* process.

Findings

Quantum entanglement is present in the HZZ* interaction.

Complete spin density matrix was successfully extracted.

Insights into the quantum nature of Higgs interactions were obtained.

Abstract

Quantum entanglement, a fundamental feature of quantum mechanics, has become a powerful tool impacting various areas of physics. In this proceeding, we investigate the presence of quantum entanglement within the Higgs to ZZ* (HZZ*) interaction at the ATLAS experiment. Utilizing quantum tomography techniques, we extract the complete spin density matrix characterizing the HZZ* interaction from ATLAS Standard Monte Carlo (MC) HZZ* 4l Run2 samples. We then evaluate the presence of quantum entanglement in the system using the derived spin density matrix. Our investigation sheds light on the entanglement properties within the HZZ* interaction, which offers valuable insights into its quantum characteristics.