Phys. Rev. Lett. 93, 131301 (2004) [4 pages]

Emergence of a 4D World from Causal Quantum Gravity

Abstract

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J. Ambjørn^1,3,*, J. Jurkiewicz^2,†, and R. Loll^3,‡
¹The Niels Bohr Institute, Copenhagen University, Blegdamsvej 17, DK-2100 Copenhagen Ø, Denmark
²Institute of Physics, Jagellonian University, Reymonta 4, PL 30-059 Krakow, Poland
³Institute for Theoretical Physics, Utrecht University, Leuvenlaan 4, NL-3584 CE Utrecht, The Netherlands

Received 21 April 2004; published 21 September 2004

See accompanying Physics Focus

Causal Dynamical Triangulations in four dimensions provide a background-independent definition of the sum over geometries in nonperturbative quantum gravity, with a positive cosmological constant. We present evidence that a macroscopic four-dimensional world emerges from this theory dynamically.

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.93.131301

DOI:

10.1103/PhysRevLett.93.131301

PACS:

04.60.Gw, 04.60.Nc

^*Electronic address: ambjorn@nbi.dk, j.ambjorn@phys.uu.nl

^†Electronic address: jurkiewicz@th.if.uj.edu.pl

^‡Electronic address: r.loll@phys.uu.nl

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Phys. Rev. Lett. 93, 131301 (2004) [4 pages]

Emergence of a 4D World from Causal Quantum Gravity