High-Accuracy Optical Clock Based on the Octupole Transition in 171Yb+

被引:199
作者
Huntemann, N. [1 ]
Okhapkin, M. [1 ]
Lipphardt, B. [1 ]
Weyers, S. [1 ]
Tamm, Chr. [1 ]
Peik, E. [1 ]
机构
[1] Phys Tech Bundesanstalt, D-38116 Braunschweig, Germany
关键词
FREQUENCY STANDARD; SINGLE-ION; YB-II; SHIFTS; TRAP;
D O I
10.1103/PhysRevLett.108.090801
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We experimentally investigate an optical frequency standard based on the 467 nm (642 THz) electric-octupole reference transition S-2(1/2)(F = 0) --> F-2(7/2)(F = 3) in a single trapped Yb-171(+) ion. The extraordinary features of this transition result from the long natural lifetime and from the 4f(13)6s(2) configuration of the upper state. The electric-quadrupole moment of the F-2(7/2) state is measured as -0.041(5)ea(0)(2), where e is the elementary charge and a(0) the Bohr radius. We also obtain information on the differential scalar and tensorial components of the static polarizability and of the probe-light-induced ac Stark shift of the octupole transition. With a real-time extrapolation scheme that eliminates this shift, the unperturbed transition frequency is realized with a fractional uncertainty of 7.1 x 10(-17). The frequency is measured as 642 121 496 772 645.15(52) Hz.
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页数:5
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