Berlin 2014 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 30: Poster: Photonics, laser development and applications, ultrashort laser pulses, quantum effects

Q 30.53: Poster

Dienstag, 18. März 2014, 16:30–18:30, Spree-Palais

BOOST-Testing fundamental physics in spaceFor the BOOST Consortium1,2, •Alexander Milke1, Deborah N. Aguilera2, Norman Gürlebeck1, Thilo Schuldt1,2, and Claus Braxmaier1,21Center of Applied Space Technology and Microgravity (ZARM), University of Bremen, Germany — 2German Aerospace Center (DLR), Bremen, Germany

We are presenting the small satellite mission BOOST (BOOst Symmetry Test). It aims for testing the foundations of special relativity by performing a modern Kennedy-Thorndike (KT) experiment. A potential violation of the boost invariance is measured by comparing two types of clocks, a highly stable optical resonator (length reference) with a molecular iodine clock (frequency reference). For realizing a small satellite compatible payload, the use of diode-laser technology is favorable and currently already under investigation with respect to other space experiments. A laser wavelength of 1016 nm is foreseen as its second harmonics accesses narrow linewidth transitions in molecular iodine. For the KT experiment, one laser is stabilized to a high finesse cavity and a second laser is frequency doubled to a wavelength of 508 nm and stabilized to a hyperfine transition in molecular iodine. Both lasers are directly compared in a beat measurement and analyzed with respect to a possible violation of boost invariance. By employing clocks with 1E-16 frequency stabilities at orbit time and by integration over 5000 orbits, a 1000-fold improvement in measuring the Kennedy-Thorndike coefficient is targeted compared to the current best terrestrial test.

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