A Tabletop Test of Gravity at sub-100 μm Distances

Details A Tabletop Test of Gravity at sub-100 μm Distances A Tabletop Test of Gravity at sub-100 μm Distances

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aps..apr.d9002s&link_type=abstract

American Physical Society, April Meeting, 2004, May 1-4, 2004, Denver, Colorado April 2004, MEETING ID: APR04, abstract #D9.002

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Recent theories of TeV physics have generated much interest in tests for deviations from Newtonian gravity at distances of less than 1 mm. Predictions of extra dimensions and other physics beyond the Standard Model include Yukawa-type modifications to the classical Newtonian gravitation potential at length scales and magnitudes that may be accessible in tabletop experiments. We have built a probe to measure gravity-like forces on the order of 10-18 N at distances of less than 100 μm.(J. Chiaverini, S. J. Smullin, A. A. Geraci, D. M. Weld, A. Kapitulnik, Phys. Rev. Lett. 90, 151101 (2003).) The force sensor is a silicon cantilever to which is attached a gold test mass. The drive mass is a pattern of alternating gold and silicon bars, which is oscillated below the test mass at a subharmonic of the cantilever resonant frequency. This talk will describe the experiment and our results.

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