High accuracy measure of atomic polarizability in an optical lattice clock

Abstract

Despite being a canonical example of quantum mechanical perturbation theory, as well as one of the earliest observed spectroscopic shifts, the Stark effect contributes the largest source of uncertainty in a modern optical atomic clock through blackbody radiation. By employing an ultracold, trapped atomic ensemble and high stability optical clock, we characterize the quadratic Stark effect with unprecedented precision. We report the ytterbium optical clock's sensitivity to electric fields (such as blackbody radiation) as the differential static polarizability of the ground and excited clock levels: 36.2612(7) kHz (kV/cm)^{-2}. The clock's fractional uncertainty due to room temperature blackbody radiation is reduced an order of magnitude to 3 \times 10^{-17}.

5 pages, 3 figures, 2 tables

References in corpus (5)

• Multipolar theory of black-body radiation shift of atomic energy levels and its implications for optical lattice clocks
• Optical Lattice Induced Light Shifts in an Yb Atomic Clock
• Frequency shift of cesium clock transition due to blackbody radiation
• Frequency shift of hyperfine transitions due to blackbody radiation
• Blackbody radiation shift of the 27Al+ 1S0 - 3P0 transition

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