Equivalence Principle in Classical and Quantum Gravity
Paunkovic, N.
; Vojinovic, MV
Universe Vol. 8, Nº 598, pp. 1 - 16, November, 2022.
ISSN (print):
ISSN (online): 2218-1997
Scimago Journal Ranking: 0,80 (in 2022)
Digital Object Identifier: 10.3390universe8110598
Abstract
We give a general overview of various flavours of the equivalence principle in classical and quantum physics, with special emphasis on the so-called weak equivalence principle, and contrast its validity in mechanics versus field theory. We also discuss its generalisation to a theory of quantum gravity. Our analysis suggests that only the strong equivalence principle can be considered fundamental enough to be generalised to a quantum gravity context since all other flavours of equivalence principle hold only approximately already at the classical level.
