This approach demonstrates how to model higher-order corrections in quantum tomography, suggesting implications for qutrit entanglement tests at the Large Hadron Collider.
Quantum tomography, as a tool to probe foundational aspects of quantum mechanics, relies on extracting spin information from angular distributions. This is inherently a leading-order technique, ill-defined when higher-order corrections are significant. For those cases, we propose to treat higher-order corrections as a background, to be modeled and subtracted from data in the same way as other backgrounds are. We illustrate this procedure for Higgs decays H → ZZ → e⁺ e⁻ μ ⁺ μ ⁻ H → Z Z → e + e - μ + μ - , which is of high interest for upcoming qutrit entanglement tests at the Large Hadron Collider.
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J. A. Aguilar–Saavedra (2025) studied this question.
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