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PreprintCC BY 4.0arXiv

Entanglement of momenta at colliders

  • Marco Fabbrichesi
  • Roberto Floreanini
  • Luca Marzola
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Abstract

We investigate the entanglement in the momenta of particle pairs produced at colliders, discarding the information on their spin state. We show how to quantify this entanglement by reducing the continuous momentum variables to a two-qubit system through hemispherical projections. We discuss in detail the production of τ-lepton pairs at an electron collider. In the Standard Model, the discretized momenta are in a genuinely maximally entangled pure state for suitable choices of the hemispheres.

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Cite

BibTeXRIS
BibTeX
@misc{fabbrichesi2026entanglement,
  title = {{Entanglement of momenta at colliders}},
  author = {Marco Fabbrichesi and Roberto Floreanini and Luca Marzola},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2606.24468},
  eprint = {2606.24468},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2606.24468},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Entanglement of momenta at colliders
AU  - Marco Fabbrichesi
AU  - Roberto Floreanini
AU  - Luca Marzola
PY  - 2026
DA  - 2026/10/27
PB  - arXiv
DO  - 10.48550/arxiv.2606.24468
UR  - https://arxiv.org/abs/2606.24468
AB  - We investigate the entanglement in the momenta of particle pairs produced at colliders, discarding the information on their spin state. We show how to quantify this entanglement by reducing the continuous momentum variables to a two-qubit system through hemispherical projections. We discuss in detail the production of τ-lepton pairs at an electron collider. In the Standard Model, the discretized momenta are in a genuinely maximally entangled pure state for suitable choices of the hemispheres.
ER  -