Comments on Background Independence and Gauge Redundancies

Details Comments on Background Independence and Gauge Redundancies Comments on Background Independence and Gauge Redundancies

2008-09-23

arxiv.org/abs/0809.3962v2

Adv.Sci.Lett.2:244-250,2009

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

8 pages, 1 figure, to appear in Adv. Sci. Lett

Scientific paper

10.1166/asl.2009.1031

We describe the definition and the role background independence and the closely related notion of diffeomorphism invariance play in modern string theory. These important concepts are transformed by a new understanding of gauge redundancies and their implementation in non-perturbative quantum field theory and quantum gravity. This new understanding also suggests a new role for the so-called background-independent approaches to directly quantize the gravitational field. This article is intended for a general audience, and is based on a plenary talk given in the Loops 2007 conference in Morelia, Mexico.

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