(Quantum) Space-Time as a Statistical Geometry of Lumps in Random Networks

Details (Quantum) Space-Time as a Statistical Geometry of Lumps in Random Networks (Quantum) Space-Time as a Statistical Geometry of Lumps in Random Networks

1999-12-15

arxiv.org/abs/gr-qc/9912059v1

Class.Quant.Grav. 17 (2000) 2029-2058

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

35 pages, Latex, under consideration by CQG

Scientific paper

10.1088/0264-9381/17/10/301

In the following we undertake to describe how macroscopic space-time (or rather, a microscopic protoform of it) is supposed to emerge as a superstructure of a web of lumps in a stochastic discrete network structure. As in preceding work (mentioned below), our analysis is based on the working philosophy that both physics and the corresponding mathematics have to be genuinely discrete on the primordial (Planck scale) level. This strategy is concretely implemented in the form of \tit{cellular networks} and \tit{random graphs}. One of our main themes is the development of the concept of \tit{physical (proto)points} or \tit{lumps} as densely entangled subcomplexes of the network and their respective web, establishing something like \tit{(proto)causality}. It may perhaps be said that certain parts of our programme are realisations of some early ideas of Menger and more recent ones sketched by Smolin a couple of years ago. We briefly indicate how this \tit{two-story-concept} of \tit{quantum} space-time can be used to encode the (at least in our view) existing non-local aspects of quantum theory without violating macroscopic space-time causality.

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