Quantum gravity: Back to the future

  title={Quantum gravity: Back to the future},
  author={Philip Ball},
  • P. Ball
  • Published 5 February 2004
  • Physics, Education
  • Nature
From reruns of a nineteenth-century experiment performed with breathtaking precision, we may gain our first glimpses of the physics that lies beyond Einstein's theories of relativity. Philip Ball reports. 
4 Citations
Newtonian versus Special-Relativistic Statistical Predictions for Low-Speed Scattering
For low-speed chaotic scattering, special-relativistic mechanics must be used, instead of the standard practice of using Newtonian mechanics, to obtain empirically-correct statistical predictions from an initially well-localized Gaussian ensemble.
Review of Multiscale Modeling of Detonation
Issues associated with modeling the multiscale nature of detonation are reviewed, and potential applications to detonation-driven propulsion systems are discussed. It is suggested that a failure of


Cosmological constraints on Lorentz violation in electrodynamics.
Infrared, optical, and ultraviolet spectropolarimetry of cosmological sources is used to constrain the pure electromagnetic sector of a general Lorentz-violating standard-model extension. The
A strong astrophysical constraint on the violation of special relativity by quantum gravity
The observation of 100-MeV synchrotron radiation from the Crab nebula is used to improve the previous limit by a factor of 40 million, ruling out this type of Lorentz violation, and thereby providing an important constraint on theories of quantum gravity.
Modern Michelson-Morley experiment using cryogenic optical resonators.
A new test of Lorentz invariance is performed by comparing the resonance frequencies of two orthogonal cryogenic optical resonators subject to Earth's rotation over approximately 1 yr, improving the best previous result by about 2 orders of magnitude.
Tests of Lorentz invariance using a microwave resonator.
The frequencies of a cryogenic sapphire oscillator and a hydrogen maser are compared to set new constraints on a possible violation of Lorentz invariance and determine the variation of the oscillator frequency as a function of its orientation and of its velocity with respect to a preferred frame candidate.
On the relative motion of the Earth and the luminiferous ether
THE discovery. of the aberration of light was soon followed by an explanation according to the emission theory. The effect was attributed to a simple composition of the velocity of light with the
Zur Elektrodynamik bewegter Körper
Este material fue digitalizado en el marco del proyecto subvencionado por la Fundacion Antorchas y se encuentra en la Biblioteca del Departamento de Fisica de la Facultad de Ciencias Exactas de la
Ann. Phys
  • Ann. Phys
  • 1905
Proc Acad. Sci. Amsterdam
  • Proc Acad. Sci. Amsterdam
  • 1904
Phys. Rev. Lett
  • Phys. Rev. Lett
  • 2003
High-Energy Phys
  • High-Energy Phys
  • 2003