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Entanglement distribution in Bhabha scattering with entangled spectator particle

Published 19 Jan 2024 in quant-ph, hep-ph, and hep-th | (2401.10715v1)

Abstract: We analyze how entanglement is generated and distributed in a Bhabha scattering process $(e-e+\rightarrow e-e+)$ at tree level. In our setup an electron $A$ scatters with a positron $B$, which is initially entangled with another electron $C$ (spectator), that does not participate directly to the process. We find that the QED scattering generates and distributes entanglement in a non-trivial way among the three particles: the correlations in the output channels $AB$, $AC$ and $BC$ are studied in detail as functions of the scattering parameters and of the initial entanglement weight. Although derived in a specific case, our results exhibit some general features of other similar QED scattering processes, for which the extension of the present analysis is straightforward.

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