Abstract
We have determined the frequency shift that blackbody radiation is inducing on the clock transition in strontium. Previously its uncertainty limited the uncertainty of strontium lattice clocks to . Now the uncertainty associated with the blackbody radiation shift correction translates to a relative frequency uncertainty at room temperature. Our evaluation is based on a measurement of the differential dc polarizability of the two clock states and on a modeling of the dynamic contribution using this value and experimental data for other atomic properties.
- Received 14 August 2012
DOI:https://doi.org/10.1103/PhysRevLett.109.263004
© 2012 American Physical Society