Can we see evidence of quantum gravity? A thought experiment says for some models, no
APR 02, 2010
DOI: 10.1063/PT.5.024214
Science : Physicists’ best chance of spotting an effect of " quantum gravity "—the melding of quantum mechanics and Einstein’s theory of gravity—may have evaporated.According to some quantum-gravity theories, the speed of light may change very slightly with the light’s wavelength, and experimenters are searching for the effect in radiation from distant stellar explosions.Those searches may be in vain, however says Sabine Hossenfelder of the Nordic Institute for Theoretical Physics in Stockholm . If light’s speed varied in this way, then untenable paradoxes would arise, she says .The speed variations must be at least 23 orders of magnitude smaller than experimental limits set last year, she adds. Related link The box-problem in deformed special relativity
© 2010 American Institute of Physics
