Testing the foundations of special relativity cryogenic optical resonators

A new Michelson-Morley (MM) experiment was performed by a one-year comparison of the frequencies /spl nu//sub x/ and /spl nu//sub y/ of two lasers stabilized to crossed cryogenic optical resonators (COREs) at 10.64 nm. The developed laser stabilization scheme uses automatic beam positioning to compensate for cryostat movements. Data were analyzed within the general standard model extension (SME).