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The Problem of Classical Limit in Quantum Cosmology: The effective action language

B. L. Altshuler·A. M. Boyarsky·A. Yu. Neronov
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Abstract

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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B. L. Altshuler, A. M. Boyarsky, A. Yu. Neronov. 1995-11-27. The Problem of Classical Limit in Quantum Cosmology: The effective action language. https://doi.org/10.1142/s0218271896000527

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