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Disappearance and emergence of space and time in quantum gravity

Oriti, Daniele (2013) Disappearance and emergence of space and time in quantum gravity. In: UNSPECIFIED.

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Abstract

We discuss the hints for the disappearance of continuum space and time at microscopic scale. These include arguments for a discrete nature of them or for a fundamental non-locality, in a quantum theory of gravity. We discuss how these ideas are realized in specific quantum gravity approaches. Turning then the problem around, we consider the emergence of continuum space and time from the collective behaviour of discrete, pre-geometric atoms of quantum space, and for understanding spacetime as a kind of "condensate", and we present the case for this emergence process being the result of a phase transition, dubbed "geometrogenesis". We discuss some conceptual issues of this scenario and of the idea of emergent spacetime in general. As a concrete example, we outline the GFT framework for quantum gravity, and illustrate a tentative procedure for the emergence of spacetime in this framework. Last, we re-examine the conceptual issues raised by the emergent spacetime scenario in light of this concrete example.


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Item Type: Conference or Workshop Item (UNSPECIFIED)
Creators:
CreatorsEmailORCID
Oriti, Danieledaniele.oriti@aei.mpg.de
Additional Information: special issue: "Quantum Gravity", Studies in History and Philosophy of Modern Physics, (ed. D. Rickles); available on arXiv.org as: arXiv:1302.2849 [physics.hist-ph]
Keywords: quantum gravity, foundations of spacetime theories, emergent spacetime, condensed matter, cosmology
Subjects: Specific Sciences > Physics > Condensed Matter
Specific Sciences > Physics > Cosmology
Specific Sciences > Physics > Fields and Particles
Specific Sciences > Physics > Relativity Theory
Depositing User: Dr Daniele Oriti
Date Deposited: 13 Feb 2013 13:19
Last Modified: 11 Mar 2013 15:55
Item ID: 9558
Subjects: Specific Sciences > Physics > Condensed Matter
Specific Sciences > Physics > Cosmology
Specific Sciences > Physics > Fields and Particles
Specific Sciences > Physics > Relativity Theory
Date: February 2013
URI: https://philsci-archive-dev.library.pitt.edu/id/eprint/9558

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