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Publication Citation: An atomic clock with 10-18 instability

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Author(s): Andrew D. Ludlow; Nathan M. Hinkley; Jeffrey A. Sherman; Nathaniel B. Phillips; Marco Schioppo; Nathan D. Lemke; Kyle P. Beloy; M Pizzocaro; Christopher W. Oates;
Title: An atomic clock with 10-18 instability
Published: September 13, 2013
Abstract: Atomic clocks have been transformational in science and technology, leading to innovations such as global positioning, advanced communications, and tests of fundamental constant variation. Next-generation optical atomic clocks can extend the capability of these timekeepers, where researchers have long aspired toward measurement precision at 1 part in 1018. This milestone will enable a second revolution of new timing applications such as relativistic geodesy, enhanced Earth- and space-based navigation and telescopy, and new tests on physics beyond the Standard Model. Here, we describe the development and operation of two optical lattice clocks, both utilizing spin-polarized, ultracold atomic ytterbium. A measurement comparing these systems demonstrates an unprecedented atomic clock instability of 1.6x10-18 after only 7 hours of averaging.
Citation: Science
Volume: 341
Pages: pp. 1215 - 1218
Keywords: atomic clock;frequency standard;optical clock;optical lattice;ytterbium
Research Areas: Physics