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Peer-reviewedCC BY 4.0Journal of High Energy Physics

Quantum entanglement and Bell nonlocality in top-quark pair production at a photon linear collider

  • Seong Youl Choi1
  • Dong Woo Kang1
  • Jae Sik Lee2
  • Chan Beom Park2
  1. 1Jeonbuk National University
  2. 2Chonnam National University
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Abstract

A bstract : A photon linear collider, the two-photon collision mode of an e ⁺ e − linear collider, uses high-energy laser photons backscattered off the incoming electrons and positrons. The colliding-photon polarization is fully controllable through the polarizations of the initial electron and positron beams and laser photons. We investigate the impact of colliding-photon polarization on the observability of quantum entanglement in top-quark pair production at a photon linear collider. Constructing the spin density matrix of the tt ̅ two-qubit system from the helicity amplitudes, we demonstrate that a photon linear collider is an ideal machine to probe quantum entanglement and Bell nonlocality across the broad phase space of the process.

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Cite

BibTeXRIS
BibTeX
@article{choi2026quantum,
  title = {{Quantum entanglement and Bell nonlocality in top-quark pair production at a photon linear collider}},
  author = {Seong Youl Choi and Dong Woo Kang and Jae Sik Lee and Chan Beom Park},
  journal = {Journal of High Energy Physics},
  year = {2026},
  month = oct,
  doi = {10.1007/jhep10(2026)017},
  url = {https://link.springer.com/10.1007/JHEP10(2026)017},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Quantum entanglement and Bell nonlocality in top-quark pair production at a photon linear collider
AU  - Seong Youl Choi
AU  - Dong Woo Kang
AU  - Jae Sik Lee
AU  - Chan Beom Park
PY  - 2026
DA  - 2026/10/01
JO  - Journal of High Energy Physics
DO  - 10.1007/jhep10(2026)017
UR  - https://link.springer.com/10.1007/JHEP10(2026)017
AB  - A bstract : A photon linear collider, the two-photon collision mode of an e ⁺ e − linear collider, uses high-energy laser photons backscattered off the incoming electrons and positrons. The colliding-photon polarization is fully controllable through the polarizations of the initial electron and positron beams and laser photons. We investigate the impact of colliding-photon polarization on the observability of quantum entanglement in top-quark pair production at a photon linear collider. Constructing the spin density matrix of the tt ̅ two-qubit system from the helicity amplitudes, we demonstrate that a photon linear collider is an ideal machine to probe quantum entanglement and Bell nonlocality across the broad phase space of the process.
SN  - 1029-8479
ER  -