Preferred basis, decoherence and a quantum state of the Universe
- URL: http://arxiv.org/abs/2006.16812v1
- Date: Sun, 28 Jun 2020 18:07:59 GMT
- Title: Preferred basis, decoherence and a quantum state of the Universe
- Authors: Andrei O. Barvinsky and Alexander Yu. Kamenshchik
- Abstract summary: We review a number of issues in foundations of quantum theory and quantum cosmology.
These issues can be considered as a part of the scientific legacy of H.D. Zeh.
- Score: 77.34726150561087
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We review a number of issues in foundations of quantum theory and quantum
cosmology including, in particular, the problem of the preferred basis in the
many-worlds interpretation of quantum mechanics, the relation between this
interpretation and the decoherence phenomenon, application of decoherence
approach to quantum cosmology, the relation between the many-worlds
interpretation and Anthropic Principle along with the notion of
quantum-classical duality. We also discuss the concept of fundamentally mixed
quantum state of the Universe represented by a special microcanonical density
matrix and its dynamical realization in the form of the semiclassically treated
path integral over spacetime geometries and quantum matter fields. These issues
can be considered as a part of the scientific legacy of H. D. Zeh generously
left to us in his two seminal papers published at the beginning of seventies in
Foundations of Physics.
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