Phys. Rev. Lett. 56, 1215–1218 (1986)Improved Bounds on the Dimension of Space-TimeReceived 26 August 1985; published in the issue dated 24 March 1986 We treat the perihelion shift of the planetary motion and the Lamb shift in hydrogen in an arbitrary number of space dimensions. Comparison with experimental data shows that the deviation from dimensionality four of space-time is less than 10-9 and 3.6 × 10-11, respectively, on the length scales associated with these phenomena. © 1986 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.56.1215
DOI:
10.1103/PhysRevLett.56.1215
PACS:
04.20.Cv, 12.20.Ds
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