https://doi.org/10.1140/epjc/s10052-024-13364-7
Regular Article
Scrambling power of soft photons
1
Center for Field Theory and Particle Physics and Department of Physics, Fudan University, 200433, Shanghai, China
2
Dipartimento di Fisica Ettore Pancini, Università degli Studi di Napoli Federico II, Via Cintia, 80126, Naples, NA, Italy
3
INFN, Sezione di Napoli, Naples, Italy
4
Laboratori Nazionali di Frascati INFN, Frascati (Rome), EU, Italy
Received:
24
June
2024
Accepted:
11
September
2024
Published online:
6
October
2024
Observable scattering processes entail emission-absorption of soft photons. As these degrees of freedom go undetected, some information is lost. Whether some of this information can be recovered in the observation of the hard particles, depends of the actual pattern of the scrambling of information. We compute the information scrambling of electron and soft photon scattering by the tripartite mutual information in terms of the 2-Renyi entropy, and find a finite amount of scrambling is present. We show that scrambling is a byproduct of decoherence achieved by the scattering system in its interaction with the environment, due to the emission-absorption of soft photons in fully unitary processes.
© The Author(s) 2024
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