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has been cited by the following article:

• TITLE: Planck-Scale Gravity Test at PETRA

  AUTHORS: Vahagn Gharibyan, Klaus Balewski

  KEYWORDS: Experimental Test of Vacuum, Planck Energy, Gravitation, Laser Compton Scattering, Charged Particle Beams in Accelerators

  JOURNAL NAME: Journal of Modern Physics, Vol.7 No.9, May 27, 2016

  ABSTRACT: Quantum or torsion gravity models predict unusual properties of space-time at very short distances. In particular, near the Planck length, around 10-35 m, empty space may behave as a crystal, singly or doubly refractive. This hypothesis, however, remains uncheckable for any direct measurement since the smallest distance accessible in experiment is about 10-19 m at the LHC. Here we propose a laboratory test to measure space birefringence or refractivity induced by gravity. A sensitivity 10-31 m for doubly and 10-28 m for singly refractive vacuum could be reached with PETRA 6 GeV beam exploring UV laser Compton scattering.