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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.|
|Pages:||pp. 1215 - 1218|
|Keywords:||atomic clock,frequency standard,optical clock,optical lattice,ytterbium|
|PDF version:||Click here to retrieve PDF version of paper (3MB)|