Gravity and the Quantum

Details Gravity and the Quantum Gravity and the Quantum

2004-10-13

arxiv.org/abs/gr-qc/0410054v2

New J.Phys. 7 (2005) 198

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

A general review of quantum gravity addresed non-experts. To appear in the special issue `Space-time Hundred Years Later' of N

Scientific paper

10.1088/1367-2630/7/1/198

The goal of this article is to present a broad perspective on quantum gravity for \emph{non-experts}. After a historical introduction, key physical problems of quantum gravity are illustrated. While there are a number of interesting and insightful approaches to address these issues, over the past two decades sustained progress has primarily occurred in two programs: string theory and loop quantum gravity. The first program is described in Horowitz's contribution while my article will focus on the second. The emphasis is on underlying ideas, conceptual issues and overall status of the program rather than mathematical details and associated technical subtleties.

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