The Problem of Classical Limit in Quantum Cosmology: The effective action language
classification
🌀 gr-qc
keywords
quantumactionclassicalcosmologyeffectivelanguageaveragingconstraint
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The tool of functional averaging over some ``large'' diffeomorphisms is used to describe quantum systems with constraints, in particular quantum cosmology, in the language of quantum Effective Action. Simple toy models demonstrate a supposedly general phenomenon: the presence of a constraint results in ``quantum repel'' from the classical mass shell.
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