Space-time uncertainty relation and Lorentz invariance

Details Space-time uncertainty relation and Lorentz invariance Space-time uncertainty relation and Lorentz invariance

2000-01-25

arxiv.org/abs/hep-th/0001161v3

JHEP 0005 (2000) 015

Physics

High Energy Physics

High Energy Physics - Theory

13 pages, LaTeX. References added, minor corrections, a statement deleted in summary

Scientific paper

10.1088/1126-6708/2000/05/015

We discuss a Lorentz covariant space-time uncertainty relation, which agrees with that of Karolyhazy-Ng-van Dam when an observational time period delta t is larger than the Planck time lp. At delta t < lp, this uncertainty relation takes roughly the form delta t delta x > lp^2, which can be derived from the condition prohibiting the multi-production of probes to a geometry. We show that there exists a minimal area rather than a minimal length in the four-dimensional case. We study also a three-dimensional free field theory on a non-commutative space-time realizing the uncertainty relation. We derive the algebra among the coordinate and momentum operators and define a positive-definite norm of the representation space. In four-dimensional space-time, the Jacobi identity should be violated in the algebraic representation of the uncertainty relation.

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