DocumentCode :
185874
Title :
Optical atomic clock measurements at the mHz level
Author :
Hinkley, N. ; Beloy, K. ; Phillips, Niki ; Schioppo, M. ; Sherman, J.A. ; Oates, C.W. ; Ludlow, A.D.
Author_Institution :
Time & Freq. Div., Nat. Inst. of Stand. & Technol., Boulder, CO, USA
fYear :
2014
fDate :
19-22 May 2014
Firstpage :
1
Lastpage :
1
Abstract :
Time (or its inverse, frequency) is the most precisely measured physical quantity and therefore is exploited in many fundamental investigations of nature. The advent of atomic clocks based on optical transitions has led to 10-100 times improvement in our timekeeping capabilities, with some measurements of optical frequencies reaching the mHz level [1,2]. Timekeeping precision at 1 part in 1018 enables new timing applications in relativistic geodesy, enhanced Earth- and space-based navigation and telescopy, and new tests of physics beyond the standard model. Here, we describe the development of two optical lattice clocks, both using spin-polarized, ultracold atomic ytterbium, and we discuss their operation at 10-18 instability as well as measurements toward the goal of 10-18 uncertainty.
Keywords :
atomic clocks; frequency measurement; measurement uncertainty; polarisation; radiation pressure; time measurement; timing; ytterbium; Earth based navigation; Yb; measurement uncertainty; optical atomic clock measurement; optical frequency measurement; optical lattice clock; optical transitions; relativistic geodesy; space-based navigation; spin polarisation; telescopy; time measurement; timekeeping precision; timing application; ultracold atomic ytterbium; Atom optics; Atomic clocks; Atomic measurements; Lattices; Optical variables measurement; Ytterbium;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Frequency Control Symposium (FCS), 2014 IEEE International
Conference_Location :
Taipei
Type :
conf
DOI :
10.1109/FCS.2014.6859905
Filename :
6859905
Link To Document :
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