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 to reproduce 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 are a first step towards understanding the connections between maximal entanglement and the fundamental symmetries of high-energy physics.
Cervera-Lierta, A., Latorre, J., Rojo, J., Rottoli, L. (2017). Maximal Entanglement in High Energy Physics. SCIPOST PHYSICS, 3(5) [10.21468/SciPostPhys.3.5.036].
Maximal Entanglement in High Energy Physics
Rottoli, L
2017
Abstract
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 to reproduce 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 are a first step towards understanding the connections between maximal entanglement and the fundamental symmetries of high-energy physics.File | Dimensione | Formato | |
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