Physics
Scientific paper
Feb 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005tmgm.meet.2121t&link_type=abstract
The Tenth Marcel Grossmann Meeting. Proceedings of the MG10 Meeting held at Brazilian Center for Research in Physics (CBPF), Rio
Physics
Scientific paper
The conventional understanding of the Universe admits four fundamental interactions or forces - Gravitational, Electromagnetic, and the Strong and Weak Nuclear Forces. It is widely believed that these four forces are really manifestations of a single underlying and unifying interaction that can be revealed if one examines nature with sufficiently precise measurement. Naturally it is not clear what type of precise measurement will reveal deviations from the present understanding. Particle accelerators directly probe nature on short-distance and high-energy; an alternative approach is to search for exquisitely small deviations from known physics that can be seen on conventional energy and distance scales. Examples of such measurements include new versions of the famous Michelson-Morley and Kennedy-Thoradike experiments, as well as laboratory measurements of the time independence of the fine structure constant and tests of Standard Model Extensions. We are developing a new range of oscillators based on high-Q microwave resonators, when combined with the best from across the world, offer the prospect of measurements that may reveal this next layer of understanding. To achieve these types of measurements, oscillators with frequency stability in the sub-10-15 range are necessary. This type of performance can be achieved with state-of-the art cryogenic microwave oscillators.
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