Muciño, Ricardo and Okon, Elias and Sudarsky, Daniel and Wiedemann, Martín (2025) Fully Self-Consistent Semiclassical Gravity. [Preprint]

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Abstract

A theory of quantum gravity consists of a gravitational framework which, unlike general relativity, takes into account the quantum character of matter. In spite of impressive advances, no fully satisfactory, self-consistent and empirically viable theory with those characteristics has ever been constructed. A successful semiclassical gravity model, in which the classical Einstein tensor couples to the expectation value of the energy-momentum tensor of quantum matter fields, would, at the very least, constitute a useful stepping stone towards quantum gravity. However, not only no empirically viable semiclassical theory has ever been proposed, but the self-consistency of semiclassical gravity itself has been called into question repeatedly over the years. Here, we put forward a fully self-consistent, empirically viable semiclassical gravity framework, in which the expectation value of the energy-momentum tensor of a quantum field, evolving via a relativistic objective collapse dynamics, couples to a fully classical Einstein tensor. We present the general framework, a concrete example, and briefly explore possible empirical consequences of our model.

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Item Type:	Preprint
Creators:	Creators Email ORCID Muciño, Ricardo ric.phys@ciencias.unam.mx Okon, Elias eokon@filosoficas.unam.mx Sudarsky, Daniel sudarsky@nucleares.unam.mx Wiedemann, Martín wiedemann02@hotmail.com
Keywords:	Semiclassical gravity; Objective collapse; Relativistic collapse.
Subjects:	Specific Sciences > Physics > Classical Physics Specific Sciences > Physics > Quantum Gravity Specific Sciences > Physics > Quantum Field Theory Specific Sciences > Physics > Quantum Mechanics Specific Sciences > Physics > Relativity Theory
Depositing User:	Dr. Elias Okon
Date Deposited:	23 Jun 2025 13:21
Last Modified:	23 Jun 2025 13:21
Item ID:	25780
Subjects:	Specific Sciences > Physics > Classical Physics Specific Sciences > Physics > Quantum Gravity Specific Sciences > Physics > Quantum Field Theory Specific Sciences > Physics > Quantum Mechanics Specific Sciences > Physics > Relativity Theory
Date:	22 June 2025
URI:	https://philsci-archive.pitt.edu/id/eprint/25780

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