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arXiv · 1409.7951

Test of Time Dilation Using Stored Li+ Ions as Clocks at Relativistic Speed

Benjamin Botermann·Dennis Bing·Christopher Geppert·Gerald Gwinner·Theodor W. Hänsch·Gerhard Huber·Sergei Karpuk·Andreas Krieger·Thomas Kühl·Wilfried Nörtershäuser·Christian Novotny·Sascha Reinhardt·Rodolfo Sánchez·Dirk Schwalm·Thomas Stöhlker·Andreas Wolf·Guido Saathoff
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Abstract

We present the concluding result from an Ives-Stilwell-type time dilation experiment using 7Li+ ions confined at a velocity of beta = v/c = 0.338 in the storage ring ESR at Darmstadt. A Lambda-type three-level system within the hyperfine structure of the 7Li+ triplet S1-P2 line is driven by two laser beams aligned parallel and antiparallel relative to the ion beam. The lasers' Doppler shifted frequencies required for resonance are measured with an accuracy of < 4 ppb using optical-optical double resonance spectroscopy. This allows us to verify the Special Relativity relation between the time dilation factor gamma and the velocity beta to within 2.3 ppb at this velocity. The result, which is singled out by a high boost velocity beta, is also interpreted within Lorentz Invariance violating test theories.

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Benjamin Botermann, Dennis Bing, Christopher Geppert, Gerald Gwinner, Theodor W. Hänsch, Gerhard Huber, Sergei Karpuk, Andreas Krieger, Thomas Kühl, Wilfried Nörtershäuser, Christian Novotny, Sascha Reinhardt, Rodolfo Sánchez, Dirk Schwalm, Thomas Stöhlker, Andreas Wolf, Guido Saathoff. 2014-09-28. Test of Time Dilation Using Stored Li+ Ions as Clocks at Relativistic Speed. https://doi.org/10.1103/physrevlett.113.120405

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