Interacting fermions in an expanding spacetime

Interacting fermions in an expanding spacetime

Phys. Rev. D 98, 125009 (2018) We evaluate the effect of quantum electrodynamics on the correlations between Dirac field modes corresponding electron-positron pairs of opposite momenta generated by expansion of an asymptotically flat Friedmann-Robertson-Walker (FRW) universe. The mutual information...

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Bibliographic Details
Main Authors: Machado, L. N, Costa, H. A. S, da Paz, I. G, Sampaio, M, Araujo, Jonas B
Format: Journal Article
Language:English
Published: 01-11-2018
Subjects:
Physics - High Energy Physics - Theory
Online Access:Get full text
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Summary:Phys. Rev. D 98, 125009 (2018) We evaluate the effect of quantum electrodynamics on the correlations between Dirac field modes corresponding electron-positron pairs of opposite momenta generated by expansion of an asymptotically flat Friedmann-Robertson-Walker (FRW) universe. The mutual information of out-going electron-positron pairs is evaluated to leading order in the coupling strength and compared with the free case. It is shown a decrease in the mutual information between the electron and positron. In addition, it is found that the change in the electron-positron mutual information depends on how the momentum is distributed between the positron and photon modes.
DOI:10.48550/arxiv.1811.00575