BEGIN:VCALENDAR VERSION:2.0 PRODID:Data::ICal 0.22 BEGIN:VEVENT DESCRIPTION:Thaned Pruttivarasin\, \n\n
The outcome of an experiment shou ld not depend on the orientation of the apparatus in space. This important cornerstone of physics is deeply engrained into the Standard Model of Phy sics by requiring that all fields must be Lorentz invariant. However\, it is well-known that the Standard Model is incomplete. Some theories conject ure that at the Planck scale Lorentz symmetry might be broken and measurab le at experimentally accessible energy scales. Therefore\, a search for vi olation of Lorentz symmetry directly probes physics beyond the Standard mo del. We present a novel experiment utilizing trapped calcium ions as a dir ect probe of Lorentz-violation in the electron-photon sector. We monitor t he energy between atomic states with different orientations of the electro nic wave-functions as they rotate together with the motion of the Earth. T his is analogous to the famous Michelson-Morley experiment. To remove magn etic field noise\, we perform the experiment with the ions prepared in the decoherence-free states. Our result improves on the most stringent bounds on Lorentz symmetry for electrons by 100 times. The experimental scheme i s readily applicable to many ion species\, hence opening up paths toward m uch improved test of Lorentz symmetry in the future.
\n DTSTART:20160531T193000Z LOCATION:Physics Building\, Room 203 SUMMARY:Test of Lorentz symmetry with trapped ions END:VEVENT END:VCALENDAR