Open AccessHigh-accuracy measurement of the ^113Cd^+ ground-state hyperfine splitting at the milli-Hertz level
Author(s) -
S G Wang,
J. W. Zhang,
Kai Miao,
Z B Wang,
L J Wang
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.012434
Subject(s) - hyperfine structure , microwave , atomic physics , physics , ion , hertz , laser , optics , quadrupole , ground state , ion trap , frequency standard , quantum mechanics
We have developed a microwave frequency standard based on the 15.2 GHz ground-stated hyperfine transition of (113)C(+) ions. Using a laser-cooled ion cloud trapped in a linear quadrupole Paul trap, the clock transition frequency is measured to be 15 199 862 855.0125(87) Hz, with an accuracy at the 10(-13) level. The main errors are from the microwave frequency reference used in the experiment. The precision is improved by nearly two orders of magnitude than that reported before.