Mathematics – Logic
Scientific paper
May 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aps..apr.a1001a&link_type=abstract
American Physical Society, April Meeting, 2004, May 1-4, 2004, Denver, Colorado April 2004, MEETING ID: APR04, abstract #A1.001
Mathematics
Logic
Scientific paper
It is remarkable that questions about gravitation, the oldest known interaction in physics, are again at the center of physics and that small-scale experiments can address important open issues in fundamental science such as: "why is gravity so weak compared to the other interactions?" and ``why is the cosmological constant so small compared to the predictions of quantum mechanics?" Modern string theory ideas (new scalar particles and extra dimensions) and other notions hint that Newton's Inverse-Square Law may break down at distances less than 1 mm or even at solar-system scales. I will review some motivations for testing the Inverse-Square Law, and discuss the techniques employed, ranging from ultracold neutron technology, extremely sensitive mechanical experiments with torsion oscillators and microcantilevers, to ultra-precise laser ranging of the moon.
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