Cosmological evidence against time variation of the fundamental atomic constants

Baum, W. A.; Florentin-Nielsen, R.

doi:10.1086/154723

Cited by 16 publications

(6 citation statements)

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“…Further works were performed by Solheim et al (1973) and Baum and Florentin-Nielsen (1976) who compared the light of nearby and distant galaxies in order to test the constancy of Eλ. Bekenstein (1979) demonstrated that these experiments were meaningless since the constancy of Eλ was interpreted as the constancy of hc but that this latter fact was implicitely assumed in the two experiments since the wave vector and momentum of the photon were both parallely propagated.…”

Section: F Attempts To Constrain the Variation Of Dimensionful Constantsmentioning

confidence: 99%

The fundamental constants and their variation: observational and theoretical status

2003

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This article describes the various experimental bounds on the variation of the fundamental constants of nature. After a discussion on the role of fundamental constants, of their definition and link with metrology, the various constraints on the variation of the fine structure constant, the gravitational, weak and strong interactions couplings and the electron to proton mass ratio are reviewed. This review aims (1) to provide the basics of each measurement, (2) to show as clearly as possible why it constrains a given constant and (3) to point out the underlying hypotheses. Such an investigation is of importance to compare the different results, particularly in view of understanding the recent claims of the detections of a variation of the fine structure constant and of the electron to proton mass ratio in quasar absorption spectra. The theoretical models leading to the prediction of such variation are also reviewed, including KaluzaKlein theories, string theories and other alternative theories and cosmological implications of these results are discussed. The links with the tests of general relativity are emphasized.

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Section: F Attempts To Constrain the Variation Of Dimensionful Constantsmentioning

confidence: 99%

The fundamental constants and their variation: observational and theoretical status

2003

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“…Thus, speaking in theoretical terms of time varying dimensional constants can lead to problems. To give an historical example, papers [18,19] were written claiming stringent experimental upper bounds on the time variability of the dimensional quantity hc. In these the product Eλ was found to be the same for light emitted at very different redshifts.…”

Section: The Meaning Of a Variable Speed Of Lightmentioning

confidence: 99%

“…If ċ/c = 0 we have that v ∝ c 2 . Again any primordial vorticity is safely suppressed after a phase transition in c satisfying any of the conditions (2) or (18).…”

Section: The Isotropy Of the Universementioning

confidence: 99%

Time varying speed of light as a solution to cosmological puzzles

1999

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We consider the cosmological implications of light travelling faster in the early Universe. We propose a prescription for deriving corrections to the cosmological evolution equations while the speed of light c is changing. We then show how the horizon, flatness, and cosmological constant problems may be solved. We also study cosmological perturbations in this scenario and show how one may solve the homogeneity and isotropy problems. As it stands, our scenario appears to most easily produce extreme homogeneity, requiring structure to be produced in the Standard Big Bang epoch. Producing significant perturbations during the earlier epoch would require a rather careful design of the function c(t). The large entropy inside the horizon nowadays can also be accounted for in this scenario.

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“…This does not necessarily mean that the absorber theory is wrong, because there is a doubt that the precise form of the experiment used by Partridge could detect the effects he was looking for (Pegg, 1973). These experiments are astrophysical in nature and indicate that h has been varying at a rate of less than 5 x w-ta yr-1 and probably at a rate of less than 2 X w-14 yr-1 Florentin-Nielsen, 1975, 1976). Although they are of doubtful significance as regards the absorptive properties of the Universe, Partridge's results are still of use.…”

Section: Gm Hmentioning

confidence: 99%

Gravity, Particles, and Astrophysics

Wesson¹

1980

Astrophysics and Space Science Library

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Cosmological evidence against time variation of the fundamental atomic constants

Cited by 16 publications

References 0 publications

The fundamental constants and their variation: observational and theoretical status

The fundamental constants and their variation: observational and theoretical status

Time varying speed of light as a solution to cosmological puzzles

Gravity, Particles, and Astrophysics

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