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hep-th2018★ 6 cited
Interacting fermions in an expanding spacetime
L. N. Machado, H. A. S. Costa, I. G. da Paz +2
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…
gr-qc2018★ 3 cited
Parameter estimation for a Lorentz invariance violation
H. A. S. Costa, P. R. S. Carvalho, I. G. da Paz
We employ techniques from quantum estimation theory (QET) to estimate the Lorentz violation parameters in the 1+3-dimensional flat spacetime. We obtain and discuss the expression o…