NDLI: Quantum nature of cosmological bounces

Content Provider	Springer Nature Link
Author	Bojowald, Martin
Copyright Year	2008
Abstract	Several examples are known where quantum gravity effects resolve the classical big bang singularity by a bounce. The most detailed analysis has probably occurred for loop quantum cosmology of isotropic models sourced by a free, massless scalar. Once a bounce has been realized under fairly general conditions, the central questions are how strongly quantum it behaves, what influence quantum effects can have on its appearance, and what quantum space-time beyond the bounce may look like. This, then, has to be taken into account for effective equations which describe the evolution properly and can be used for further phenomenological investigations. Here, we provide the first analysis with interacting matter with new effective equations valid for weak self-interactions or small masses. They differ from the free scalar equations by crucial terms and have an important influence on the bounce and the space-time around it. Especially the role of squeezed states, which have often been overlooked in this context, is highlighted. The presence of a bounce is proven for uncorrelated states, but as squeezing is a dynamical property and may change in time, further work is required for a general conclusion.
Starting Page	2659
Ending Page	2683
Page Count	25
File Format	PDF
ISSN	00017701
Journal	General Relativity and Gravitation
Volume Number	40
Issue Number	12
e-ISSN	15729532
Language	English
Publisher	Springer US
Publisher Date	2008-04-25
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Quantum cosmology Big bang singularity Bounce Squeezed states Astronomy, Astrophysics and Cosmology Differential Geometry Relativity and Cosmology Mathematical and Computational Physics Quantum Physics
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Effects of the quantization ambiguities on the Big Bounce dynamics

Quantum driven bounce of the future universe

Casimir effects near the big rip singularity in viscous cosmology

Do primordial lithium abundances imply there’s no dark energy?

The cosmological constant

Loop quantum cosmology: an overview

Cosmological constant and lensing

Big bounce from spin and torsion

The nature of singularity in multidimensional anisotropic Gauss–Bonnet cosmology with a perfect fluid

Quantum nature of cosmological bounces

Similar Documents

Effects of the quantization ambiguities on the Big Bounce dynamics

Quantum driven bounce of the future universe

Casimir effects near the big rip singularity in viscous cosmology

Do primordial lithium abundances imply there’s no dark energy?

The cosmological constant

Loop quantum cosmology: an overview

Cosmological constant and lensing

Big bounce from spin and torsion

The nature of singularity in multidimensional anisotropic Gauss–Bonnet cosmology with a perfect fluid

Quantum nature of cosmological bounces