A review of one-way and two-way experiments to test the isotropy of the speed of light

Ahmed, Md. Farid; Quine, Brendan M.; Sargoytchev, Stoyan Sarg; Stauffer, A D

doi:10.1007/s12648-012-0112-4

Cited by 4 publications

(5 citation statements)

References 81 publications

(69 reference statements)

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“…However, the Michelson-Morley experiment and its decedents involve the two-way propagation of light. Thus, they refer to the average speed of light [3]. Recently, a one-way experiment was performed by the GRAAL facility in the European Synchrotron Radiation Facility (ESRF) [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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Constraints on spacetime anisotropy and Lorentz violation from the GRAAL experiment

Chang

Wang

2013

Eur. Phys. J. C

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The GRAAL experiment could constrain the variations of the speed of light. The anisotropy of the speed of light may imply that the spacetime is anisotropic. Finsler geometry is a reasonable candidate to deal with the spacetime anisotropy. In this paper, the Lorentz invariance violation (LIV) of the photon sector is investigated in the locally Minkowski spacetime. The locally Minkowski spacetime is a class of flat Finsler spacetime and refers a metric with the anisotropic departure from the Minkowski one. The LIV matrices used to fit the experimental data are represented in terms of these metric deviations.The GRAAL experiment constrains the spacetime anisotropy to be less than 10 −14 . In addition, we find that the simplest Finslerian photon sector could be viewed as a geometric representation of the photon sector in the minimal standard model extension (SME).

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Section: Introductionmentioning

confidence: 99%

“…This is the first kinematical non-threshold approach to test the Lorentz symmetry in the collision physics [7]. The one-way experiment is sensitive to the first-order variation of the speed of light [3].…”

Section: Introductionmentioning

confidence: 99%

Constraints on spacetime anisotropy and Lorentz violation from the GRAAL experiment

Chang

Wang

2013

Eur. Phys. J. C

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“…However, the designs of experiments to analyze one-way light speeds have been incapable of detecting the light speed anisotropies predicted by the AST framework. With the exception of a space flight experiment that could not distinguish between potential anisotropies in the speed of light and gravitational effects [34] , [35] , all of the modern experiments to detect the one-way speed of light have relied on changes in the Earth's movement to alter the speed of the test equipment relative to a potential external PRF [36] – [44] . The null results of these experiments are compatible with the ECI as the PRF, as the movement of the Earth would not alter the location of the test equipment relative to the ECI.…”

Section: Theoretical Considerationsmentioning

confidence: 99%

Implications of an Absolute Simultaneity Theory for Cosmology and Universe Acceleration

Kipreos

2014

PLoS ONE

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An alternate Lorentz transformation, Absolute Lorentz Transformation (ALT), has similar kinematics to special relativity yet maintains absolute simultaneity in the context of a preferred reference frame. In this study, it is shown that ALT is compatible with current experiments to test Lorentz invariance only if the proposed preferred reference frame is locally equivalent to the Earth-centered non-rotating inertial reference frame, with the inference that in an ALT framework, preferred reference frames are associated with centers of gravitational mass. Applying this theoretical framework to cosmological data produces a scenario of universal time contraction in the past. In this scenario, past time contraction would be associated with increased levels of blueshifted light emissions from cosmological objects when viewed from our current perspective. The observation that distant Type Ia supernovae are dimmer than predicted by linear Hubble expansion currently provides the most direct evidence for an accelerating universe. Adjusting for the effects of time contraction on a redshift–distance modulus diagram produces a linear distribution of supernovae over the full redshift spectrum that is consistent with a non-accelerating universe.

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“…Really, parts of the conjectures or conclusions of SR show consistency with experiments. Michelson-Morley experiment is thought to be very important to SR, it has been repeated many times using the latest technology (Kennedy 1926, Muller, Herrmann et al 2003, Mueller, Stanwix et al 2007, Ahmed, Quine et al 2012, which confirms the conjecture that the speed of light is constant in one interpretation; time dilation has been thought as a fascinating conclusion of SR, it was confirmed by many experiments (Saathoff, Karpuk et al 2003, Gwinner 2005, Reinhardt, Saathoff et al 2007, Botermann, Bing et al 2014, Ozer 2020. But opponents also have their logic and facts.…”

Section: Introductionmentioning

confidence: 63%

The Incorrectness of Special Relativity and an Understanding of Time

Cui

2024

APR

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This paper has analyzed the original paper of special relativity of Einstein carefully. It was found that the derivation process of the theory based on a fatal logic error of physics, which indicates that the theory of special relativity lacks a correct theoretical basis, combined with the analysis of its conclusions, inference and experimental verification, the conclusion is that special relativity is a wrong theory. With the incorrectness found in special relativity, the four-dimensional space-time derived from it then lost the foundation, so, the understanding of time almost only can go back to before the appearance of special relativity. Thus, based on previous concepts and experiments, this paper re-understood the nature of time.

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A review of one-way and two-way experiments to test the isotropy of the speed of light

Cited by 4 publications

References 81 publications

Constraints on spacetime anisotropy and Lorentz violation from the GRAAL experiment

Constraints on spacetime anisotropy and Lorentz violation from the GRAAL experiment

Implications of an Absolute Simultaneity Theory for Cosmology and Universe Acceleration

The Incorrectness of Special Relativity and an Understanding of Time

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