Imperial College London
Alternate

Prof Joao Magueijo

Faculty of Natural Sciences, Department of Physics

Professor of Physics
 
 
 
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Contact

 

j.magueijo Website

 
 
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Location

 

Huxley BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Page:2021:08/034,
author = {Page, J and Magueijo, J},
doi = {08/034},
journal = {Journal of Cosmology and Astroparticle Physics},
pages = {1--14},
title = {Linking the Baum-Hawking-Coleman mechanism with unimodular gravity and Vilenkin's probability flux},
url = {http://dx.doi.org/10.1088/1475-7516/2021/08/034},
volume = {2021},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - We revisit a mechanism proposed by Hawking to resolve the cosmological constant problem (and the controversy it generated) to identify possibly more palatable alternatives and explore new connections and interpretations. In particular, through the introduction of a new action coupling the four-form field strength F = dA to the cosmological constant via a dynamical field λ(x), a novel Baum-Hawking-Coleman type mechanism is presented. This mechanism can be seen as a generalisation of Unimodular Gravity. A theory with a similar coupling to "F2" is also presented, with promising results. We show how in such theories the 3-form is closely related to the Chern-Simons density, and its associated definition of time. On the interpretational front, we propose a method avoiding the standard Euclidean action prescription, which makes use of Vilenkin's probability flux.
AU  - Page,J
AU  - Magueijo,J
DO  - 08/034
EP  - 14
PY  - 2021///
SN  - 1475-7516
SP  - 1
TI  - Linking the Baum-Hawking-Coleman mechanism with unimodular gravity and Vilenkin's probability flux
T2  - Journal of Cosmology and Astroparticle Physics
UR  - http://dx.doi.org/10.1088/1475-7516/2021/08/034
UR  - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000686656000020&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
UR  - https://iopscience.iop.org/article/10.1088/1475-7516/2021/08/034
UR  - http://hdl.handle.net/10044/1/102077
VL  - 2021
ER  -
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