What is the no-boundary wave function of the Universe?
File(s)PhysRevD.99.043526.pdf (241.75 KB)
Published version
OA Location
Author(s)
Halliwell, JJ
Hartle, JB
Hertog, T
Type
Journal Article
Abstract
We specify the semiclassical no-boundary wave function of the Universe without relying on a functional integral of any kind. The wave function is given as a sum of specific saddle points of the dynamical theory that satisfy conditions of regularity on the geometry and field and that together yield a time-neutral state that is normalizable in an appropriate inner product. This specifies a predictive framework of semiclassical quantum cosmology that is adequate to make probabilistic predictions, which are in agreement with observations in simple models. The use of holography to go beyond the semiclassical approximation is briefly discussed.
Date Issued
2019-02-15
Date Acceptance
2019-02-01
Citation
Physical Review D, 2019, 99 (4)
ISSN
2470-0010
Publisher
American Physical Society
Journal / Book Title
Physical Review D
Volume
99
Issue
4
Copyright Statement
© 2019 The Author(s). Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license (https://creativecommons.org/licenses/by/4.0/). Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000459209700006&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Physical Sciences
Astronomy & Astrophysics
Physics, Particles & Fields
Physics
STEEPEST-DESCENT CONTOURS
PATH-INTEGRAL APPROACH
QUANTUM COSMOLOGY
STATE
Publication Status
Published
Article Number
043526
Date Publish Online
2019-02-19