D-particles and the localization limit in quantum gravity

Details D-particles and the localization limit in quantum gravity D-particles and the localization limit in quantum gravity

2003-12-30

arxiv.org/abs/hep-th/0312313v1

Class.Quant.Grav. 21 (2004) 4927-4940

Physics

High Energy Physics

High Energy Physics - Theory

18 pages, LaTex

Scientific paper

10.1088/0264-9381/21/21/011

Some recent studies of the properties of D-particles suggest that in string theory a rather conventional description of spacetime might be available up to scales that are significantly smaller than the Planck length. We test this expectation by analyzing the localization of a space-time event marked by the collision of two D-particles. We find that a spatial coordinate of the event can indeed be determined with better-than-Planckian accuracy, at the price of a rather large uncertainty in the time coordinate. We then explore the implications of these results for the popular quantum-gravity intuition which assigns to the Planck length the role of absolute limit on localization.

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