Have we Lost Spacetime on the Way? Narrowing the Gap between General Relativity and Quantum Gravity

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Abstract
Important features of space and time are taken to be missing in quantum gravity, allegedly requiring an explanation of the emergence of spacetime from non-spatio-temporal theories. In this paper, we argue that the explanatory gap between general relativity and non-spatio- temporal quantum gravity theories might significantly be reduced with two moves. First, we point out that spacetime is already partially missing in the context of general relativity when understood from a dynamical perspective. Second, we argue that most approaches to quantum gravity already start with an in-built distinction between structures to which the asymmetry between space and time can be traced back.
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2019
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LEBHWL
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First archival date: 2018-10-30
Latest version: 2 (2018-10-31)
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2018-10-30

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