Equivalence Principle in Classical and Quantum Gravity

Abstract

We give a general overview of various flavors 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 flavors of equivalence principle hold only approximately already at the classical level.

arXiv commentv2: published version, 7+6 pages

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Cited by in corpus (6)

• Entanglement Witness for the Weak Equivalence Principle
• Equivalence in virtual transitions between uniformly accelerated and static atoms: from a bird's eye
• Weak equivalence principle and nonrelativistic limit of general dispersion relations
• About the (in)equivalence between holonomic versus non-holonomic theories of gravity
• Problems with Modified Commutators
• Testing the universality of quantum gravity theories with cosmic messengers in the context of DSR theories