53 citations · 197 across the 12 of their papers we have counts for
4 papers · 1 filter
Ultracompact horizonless objects in order-reduced semiclassical gravity
Julio Arrechea, Carlos Barceló, Raúl Carballo-Rubio +1
The backreaction of quantum fields in their vacuum state results in equilibrium structures that surpass the Buchdahl compactness limit. Such backreaction is encapsulated in the vac…
After collapse: On how a physical vacuum can change the black hole paradigm
Julio Arrechea, Carlos Barceló, Valentin Boyanov
Standard General Relativity assumes that, in the absence of classical matter sources, spacetime is empty. This chapter considers and analyses the new behaviours of the gravitationa…
The harmonic background paradigm, or why gravity is attractive
Carlos Barceló, Gil Jannes
In a work by Visser, Bassett and Liberati (VBL) [Nucl. Phys. B (Proc. Suppl.) 88, 267 (2000)] a relation was suggested between a null energy condition and the censorship of superlu…
Stellar equilibrium on a physical vacuum soil
Julio Arrechea, Carlos Barceló
We show that the repulsive effects associated to the zero-point energies of quantum fields are capable of supporting ultracompact stars that overcome the compactness limits present…