Quantum Theory of Geometry III: Non-commutativity of Riemannian Structures

Details Quantum Theory of Geometry III: Non-commutativity of Riemannian Structures Quantum Theory of Geometry III: Non-commutativity of Riemannian Structures

1998-06-09

arxiv.org/abs/gr-qc/9806041v2

Class.Quant.Grav. 15 (1998) 2955-2972

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

20 pages, revtex, 1 figure. Some typos corrected. References updated

Scientific paper

10.1088/0264-9381/15/10/006

The basic framework for a systematic construction of a quantum theory of Riemannian geometry was introduced recently. The quantum versions of Riemannian structures --such as triad and area operators-- exhibit a non-commutativity. At first sight, this feature is surprising because it implies that the framework does not admit a triad representation. To better understand this property and to reconcile it with intuition, we analyze its origin in detail. In particular, a careful study of the underlying phase space is made and the feature is traced back to the classical theory; there is no anomaly associated with quantization. We also indicate why the uncertainties associated with this non-commutativity become negligible in the semi-classical regime.

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