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gr-qc2026
Scattered wave functions and worldline instantons for particle production in curved spacetime
Philip Semrén, Greger Torgrimsson
We study the production of spin- particle-antiparticle pairs in curved spacetimes with nontrivial dependence on more than one coordinate. To this end, we develop two complemen…
gr-qc2026
The near equilibrium Einstein-Boltzmann system with a simplified collision term
Philip Semrén, Michael Bradley, João M. S. Oliveira +1
A simplified relativistic kinetic theory for gases with internal degrees of freedom, based on a BGK-type collision term, is considered. First the Boltzmann equation is rewritten in…