Quantum entanglement and Bell nonlocality in top-quark pair production at a photon linear collider
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866917338410909696 |
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| author | Choi, Seong Youl Kang, Dong Woo Lee, Jae Sik Park, Chan Beom |
| author_facet | Choi, Seong Youl Kang, Dong Woo Lee, Jae Sik Park, Chan Beom |
| contents | 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 $t\bar{t}$ 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_12830 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Quantum entanglement and Bell nonlocality in top-quark pair production at a photon linear collider Choi, Seong Youl Kang, Dong Woo Lee, Jae Sik Park, Chan Beom High Energy Physics - Phenomenology High Energy Physics - Experiment 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 $t\bar{t}$ 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. |
| title | Quantum entanglement and Bell nonlocality in top-quark pair production at a photon linear collider |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2603.12830 |