Proposed test of the time independence of the fundamental constants α and me/mp using monolithic resonators

Details Proposed test of the time independence of the fundamental constants α and me/mp using monolithic resonators Proposed test of the time independence of the fundamental constants α and me/mp using monolithic resonators

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001phrvd..64d2001b&link_type=abstract

Physical Review D (Particles, Fields, Gravitation, and Cosmology), Volume 64, Issue 4, August 15, 2001, id.042001

Physics

13

Experimental Tests Of Gravitational Theories

Scientific paper

A novel method is proposed for a laboratory test of the time independence of the fine-structure constant and of the electron to proton mass ratio, employing only electromagnetic resonators. For a resonator made out of a dielectric ionic or molecular crystal, the resonance frequencies depend on the product α2me/mp through the index of refraction. A test of the time independence of α and me/mp can be performed by a search for a long-term change in the difference of two resonance frequencies exhibiting different dispersion. The method can be advantageously implemented with a single resonator. The prospects of implementation using optical resonators, systematic effects, and experimental requirements for a test at the level of 4×10-15/yr relative variation in α or me/mp are discussed. On the experimental side, birefringent monolithic sapphire optical resonators with high-reflectivity mirrors are fabricated and characterized. The measurements of optical materials with ultralow absorption loss (ppm/cm level), required for the proposed method, are also reported.

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