Year: 2025
Type: article
Abstract: We consider $N$ clones of the quantized world, interacting with each other via quantum gravity, coupled by the downscaled Newton constant $G/N$. In the limit $N\ensuremath{\rightarrow}\ensuremath{\infty}$, we obtain the semiclassical Einstein equation for every single cloneworld. In the nonrelativistic limit, De Filippo had already obtained the semiclassical Schr\"odinger-Newton equation; we present an alternative elementary proof. In the general-relativistic case, we complete the semifinished derivation of Hartle and Horowitz. We compare our simple correlated cloneworlds with Stamp's more complicated proposal of correlated worldlines and show why the two constructions differ despite the conceptual similarity.
Author: Lajos Diósi
Language: English
Subfield: Statistical and Nonlinear Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Award: G4568777066
OpenAlex ID: W4410539393