### Abstract

Original language | English |
---|---|

Pages (from-to) | 1-18 |

Number of pages | 18 |

Journal | SciPost Physics |

Volume | 3 |

Issue number | 036 |

DOIs | |

Publication status | Published - 8 Mar 2017 |

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### Bibliographical note

five pages, one figure### Keywords

- hep-th
- hep-ph
- quant-ph

### Cite this

*SciPost Physics*,

*3*(036), 1-18. https://doi.org/10.21468/SciPostPhys.3.5.036

}

*SciPost Physics*, vol. 3, no. 036, pp. 1-18. https://doi.org/10.21468/SciPostPhys.3.5.036

**Maximal Entanglement in High Energy Physics.** / Cervera-Lierta, Alba; Latorre, José I.; Rojo, Juan; Rottoli, Luca.

Research output: Contribution to Journal › Article › Academic › peer-review

TY - JOUR

T1 - Maximal Entanglement in High Energy Physics

AU - Cervera-Lierta, Alba

AU - Latorre, José I.

AU - Rojo, Juan

AU - Rottoli, Luca

N1 - five pages, one figure

PY - 2017/3/8

Y1 - 2017/3/8

N2 - We analyze how maximal entanglement is generated at the fundamental level in QED by studying correlations between helicity states in tree-level scattering processes at high energy. We demonstrate that two mechanisms for the generation of maximal entanglement are at work: i) $s$-channel processes where the virtual photon carries equal overlaps of the helicities of the final state particles, and ii) the indistinguishable superposition between $t$- and $u$-channels. We then study whether requiring maximal entanglement constrains the coupling structure of QED and the weak interactions. In the case of photon-electron interactions unconstrained by gauge symmetry, we show how this requirement allows reproducing QED. For $Z$-mediated weak scattering, the maximal entanglement principle leads to non-trivial predictions for the value of the weak mixing angle $\theta_W$. Our results illustrate the deep connections between maximal entanglement and the fundamental symmetries of high-energy physics.

AB - We analyze how maximal entanglement is generated at the fundamental level in QED by studying correlations between helicity states in tree-level scattering processes at high energy. We demonstrate that two mechanisms for the generation of maximal entanglement are at work: i) $s$-channel processes where the virtual photon carries equal overlaps of the helicities of the final state particles, and ii) the indistinguishable superposition between $t$- and $u$-channels. We then study whether requiring maximal entanglement constrains the coupling structure of QED and the weak interactions. In the case of photon-electron interactions unconstrained by gauge symmetry, we show how this requirement allows reproducing QED. For $Z$-mediated weak scattering, the maximal entanglement principle leads to non-trivial predictions for the value of the weak mixing angle $\theta_W$. Our results illustrate the deep connections between maximal entanglement and the fundamental symmetries of high-energy physics.

KW - hep-th

KW - hep-ph

KW - quant-ph

U2 - 10.21468/SciPostPhys.3.5.036

DO - 10.21468/SciPostPhys.3.5.036

M3 - Article

VL - 3

SP - 1

EP - 18

JO - SciPost Physics

JF - SciPost Physics

SN - 2542-4653

IS - 036

ER -