Universität zu Köln

Lan, Chen ORCID: 0000-0003-4549-4596 and Wang, Yi-Fan ORCID: 0000-0002-0331-7463 (2022). Semiclassical predictions of cosmological wave packets from ridgelines. Phys. Rev. D, 105 (2). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2470-0029

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Abstract

We introduce a concept of ridgelines to investigate the semiclassical predictions from wave packets with arbitrary widths in conventional quantum mechanics and the Wheeler-DeWitt quantum cosmology. Two primary approaches are applied to the exact calculation of the ridgelines, namely the contour and the stream approaches. Moreover, aspects of these are discussed and compared to other scenarios and approaches, i.e., the narrow WKB wave packets and the first-derivative test. As the main result, we show that the semiclassical predictions in toy models have more abundant solutions than the ones in the classical theory, and most interestingly they may deviate from classical solutions due to the quantum corrections.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Lan, Chen UNSPECIFIED orcid.org/0000-0003-4549-4596 UNSPECIFIED Wang, Yi-Fan UNSPECIFIED orcid.org/0000-0002-0331-7463 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-669322
DOI:	10.1103/PhysRevD.105.026002
Journal or Publication Title:	Phys. Rev. D
Volume:	105
Number:	2
Date:	2022
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	2470-0029
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language QUANTUM COSMOLOGY; APPROXIMATION; MECHANICS; EQUATIONS; GRAVITY Multiple languages Astronomy & Astrophysics; Physics, Particles & Fields Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/66932