The notion that the metric field in general relativity can be understood as a property of space-time rests on a feature of the theory sometimes called universal coupling -- the claim that rods and clocks "measure" the metric in a way that is independent of their constitution. It is pointed out that this feature is not strictly a consequence of the central dynamical tenets of the theory, and argued that the metric field would better be regarded as a (possibly emergent) field in space-time, rather than as the very fabric of space-time itself.
CITATION STYLE
Brown, H. R. (2018). The Behaviour of Rods and Clocks in General Relativity and the Meaning of the Metric Field (pp. 51–66). https://doi.org/10.1007/978-1-4939-7708-6_2
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