Past and future blurring at fundamental length scale
High Energy Physics - Theory
2010-12-15 v1
Abstract
We obtain the -deformed versions of the retarded and advanced Green functions and show that their causality properties are blurred in a time interval of the order of a length parameter . The functions also indicate a smearing of the light cone. These results favor the interpretation of as a fundamental length scale below which the concept of a point in spacetime should be substituted by the concept of a fuzzy region of radius , as proposed long ago by Heisenberg.
Cite
@article{arxiv.1012.2393,
title = {Past and future blurring at fundamental length scale},
author = {M. J. Neves and C. Farina and M. V. Cougo-Pinto},
journal= {arXiv preprint arXiv:1012.2393},
year = {2010}
}
Comments
Essentially, this is the version published in the Phys. Rev. Lett. 105, 211601 (2010). It has 4 pages and contains 2 figures