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{Magueijo:2022:10.1103/PhysRevD.106.084021,
author = {Magueijo, J},
doi = {10.1103/PhysRevD.106.084021},
journal = {PHYSICAL REVIEW D},
pages = {1--16},
title = {Connection between cosmological time and the constants of nature},
url = {http://dx.doi.org/10.1103/PhysRevD.106.084021},
volume = {106},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - We examine in greater detail the proposal that time is the conjugate of the constants of nature. Fundamentally distinct times are associated with different constants, a situation often found in “relational time” settings. We show how in regions dominated by a single constant the Hamiltonian constraint can be reframed as a Schrödinger equation in the corresponding time, solved in the connection representation by outgoing-only monochromatic plane waves moving in a “space” that generalizes the Chern-Simons functional (valid for the equation of state w=−1) for other w. We pay special attention to the issues of unitarity and the measure employed for the inner product. Normalizable superpositions can be built, including solitons, “light-rays” and coherent/squeezed states saturating a Heisenberg uncertainty relation between constants and their times. A healthy classical limit is obtained for factorizable coherent states, both in monofluid and multifluid situations. For the latter, we show how to deal with transition regions, where one is passing on the baton from one time to another, and investigate the fate of the subdominant clock. For this purpose minisuperspace is best seen as a dispersive medium, with packets moving with a group speed distinct from the phase speed. We show that the motion of the packets’ peaks reproduces the classical limit even during the transition periods, and for subdominant clocks once the transition is over. Deviations from the coherent/semiclassical limit are expected in these cases, however. The fact that we have recently transitioned from a decelerating to an accelerating Universe renders this proposal potentially testable, as explored elsewhere.
AU  - Magueijo,J
DO  - 10.1103/PhysRevD.106.084021
EP  - 16
PY  - 2022///
SN  - 2470-0010
SP  - 1
TI  - Connection between cosmological time and the constants of nature
T2  - PHYSICAL REVIEW D
UR  - http://dx.doi.org/10.1103/PhysRevD.106.084021
UR  - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000875169200008&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
UR  - https://journals.aps.org/prd/abstract/10.1103/PhysRevD.106.084021
UR  - http://hdl.handle.net/10044/1/101903
VL  - 106
ER  -
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