Emergence of a classical Universe from quantum gravity and cosmology | Zendy

Claus Kiefer | Zendy

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Emergence of a classical Universe from quantum gravity and cosmology

Author(s) -

Claus Kiefer

Publication year - 2012

Publication title -

philosophical transactions of the royal society a mathematical physical and engineering sciences

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.074

H-Index - 169

eISSN - 1471-2962

pISSN - 1364-503X

DOI - 10.1098/rsta.2011.0492

Subject(s) - quantum cosmology , physics , quantum gravity , cosmic microwave background , theoretical physics , quantum decoherence , universe , cosmology , gravitation , hořava–lifshitz gravity , classical mechanics , quantum , quantum mechanics , quantum process , quantum dynamics , anisotropy

I describe how we can understand the classical appearance of our world from a universal quantum theory. The essential ingredient is the process of decoherence. I start with a general discussion in ordinary quantum theory and then turn to quantum gravity and quantum cosmology. There is a whole hierarchy of classicality from the global gravitational field to the fluctuations in the cosmic microwave background, which serve as the seeds for the structure in the Universe.

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