In Physics Meets Philosophy at the Panck Scale. Cambridge University Press (2000)

Authors
Jeremy Butterfield
Cambridge University
Abstract
We survey some philosophical aspects of the search for a quantum theory of gravity, emphasising how quantum gravity throws into doubt the treatment of spacetime common to the two `ingredient theories' (quantum theory and general relativity), as a 4-dimensional manifold equipped with a Lorentzian metric. After an introduction (Section 1), we briefly review the conceptual problems of the ingredient theories (Section 2) and introduce the enterprise of quantum gravity (Section 3). We then describe how three main research programmes in quantum gravity treat four topics of particular importance: the scope of standard quantum theory; the nature of spacetime; spacetime diffeomorphisms, and the so-called `problem of time' (Section 4). These programmes are the old particle-physics approach, superstring theory, and canonical quantum gravity. By and large, these programmes accept most of the ingredient theories' treatment of spacetime, albeit with a metric with some type of quantum nature; but they also suggest that the treatment has fundamental limitations. This prompts the idea of going further: either by quantizing structures other than the metric, such as the topology; or by regarding such structures as phenomenological. We discuss this in Section 5.
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References found in this work BETA

On the Emergence of Time in Quantum Gravity.Jeremy Butterfield & Chris Isham - 1999 - In The Arguments of Time. Published for the British Academy by Oxford University Press. pp. 111--168.
More Roots Of Complementarity: Kantian Aspects and Influences.David Kaiser - 1991 - Studies in History and Philosophy of Science Part A 23 (2):213-239.

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Citations of this work BETA

Emergent Spacetime and Empirical (in) Coherence.Nick Huggett & Christian Wüthrich - 2013 - Studies in History and Philosophy of Modern Physics 44 (3):276-285.
Inter-Theory Relations in Quantum Gravity: Correspondence, Reduction and Emergence.Karen Crowther - 2018 - Studies in History and Philosophy of Modern Physics 63:74-85.

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