Interpretation of the decoherence functional in quantum cosmology
- 1 February 1991
- journal article
- Published by IOP Publishing in Classical and Quantum Gravity
- Vol. 8 (2) , 379-391
- https://doi.org/10.1088/0264-9381/8/2/016
Abstract
The emergence of classical properties in quantum gravity is discussed through the use of the decoherence functional. Because there is no external time parameters in quantum gravity, its formulation is different from the one in quantum mechanics. It is shown that the decoherence functional can be applied in the usual sense, if gravity can be approximated semiclassically. To illustrate the essential features, the model of a scalar field on de Sitter space is discussed in detail.Keywords
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