Interacting fermions in an expanding spacetime
High Energy Physics - Theory
2018-12-26 v2
Abstract
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.
Keywords
Cite
@article{arxiv.1811.00575,
title = {Interacting fermions in an expanding spacetime},
author = {L. N. Machado and H. A. S. Costa and I. G. da Paz and M. Sampaio and Jonas B. Araujo},
journal= {arXiv preprint arXiv:1811.00575},
year = {2018}
}
Comments
11 pages, 6 figures. To appear in Physical Review D