Is empty spacetime a physical thing?

Details Is empty spacetime a physical thing? Is empty spacetime a physical thing?

2005-06-11

arxiv.org/abs/gr-qc/0506068v2

Found.Phys. 36 (2006) 1193-1216

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

21 pages, Latex. v2: Section 5 expanded

Scientific paper

10.1007/s10701-006-9058-8

This article deals with empty spacetime and the question of its physical reality. By "empty spacetime" we mean a collection of bare spacetime points, the remains of ridding spacetime of all matter and fields. We ask whether these geometric objects--themselves intrinsic to the concept of field--might be observable through some physical test. By taking quantum-mechanical notions into account, we challenge the negative conclusion drawn from the diffeomorphism invariance postulate of general relativity, and we propose new foundational ideas regarding the possible observation--as well as conceptual overthrow--of this geometric ether.

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