2024/12/09 by Adrián del Río, del Rio, Adrian, José Navarro-Salas +1
Earth and Planetary Sciences · Engineering · #Seismic Imaging and Inversion Techniques #High-pressure geophysics and materials #Superconducting Materials and Applications
paper · pdf · doi:10.48550/arxiv.2412.06718
In this article we briefly review the adiabatic renormalization program for spin 1/2 fields in expanding universes. We introduce the method and provide explicit expressions for the renormalized vacuum expectation value of the stress-energy tensor. Then, we discuss its application to some cosmological scenario of physical interest. We end up sketching out the proof that adiabatic and DeWitt-Schwinger point-splitting schemes provide the same renormalized expectation values of the stress-energy tensor for Dirac fields.