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Quantum entanglement in electron-nucleus collisions: Role of the linearly polarized gluon distribution

Michael Fucilla

Yoshitaka Hatta

Bo-Wen Xiao

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Phys. Rev. D 114, 034031 – Published 14 August, 2026

DOI: https://doi.org/10.1103/6c93-2tgg

Abstract

We calculate the spin density matrix of a back-to-back quark-antiquark pair inclusively produced in electron-nucleus scattering, taking into account the gluon saturation effect and the linearly polarized gluon distribution. We then investigate concurrence and stabilizer Rényi entropy, quantifying entanglement, Bell nonlocality, and nonstabilizerness. We find that the linearly polarized gluon distribution tends to enhance the entanglement of a heavy quark pair when the total and relative transverse momenta of the pair are orthogonal.

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Phys. Rev. D 114, 034031– Published 14 August, 2026
  • Received 19 April 2026
  • Accepted 14 July 2026
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