In order to suppress the blackbody radiation shift of ytterbium (Yb) lattice clock, we adopt the idea of the synthetic frequency by means of the two clock transitions which correspond to the static values of the scalar and tensor dipole polarizabilities with the AMBiT software package. We have obtained the synthetic wavelength around 647.7 nm and expected when the clock laser is working at the synthetic wavelength, the systematic uncertainty due to the BBR shift can be suppressed at the level of 10 −18 or even lower.In order to suppress the blackbody radiation shift of ytterbium (Yb) lattice clock, we adopt the idea of the synthetic frequency by means of the two clock transitions which correspond to the static values of the scalar and tensor dipole polarizabilities with the AMBiT software package. We have obtained the synthetic wavelength around 647.7 nm and expected when the clock laser is working at the synthetic wavelength, the systematic uncertainty due to the BBR shift can be suppressed at the level of 10 −18 or even lower.

Wuhan University Journal of Natural SciencesSep 12, 20191 citation

Atomic Clocks with Suppressed Blackbody Radiation Shift

Valeriy I. Yudin, А. В. Тайченачев, Maksim V. Okhapkin +6 more

We develop a concept of atomic clocks where the blackbody radiation shift and its fluctuations can be suppressed by 1--3 orders of magnitude independent of the environmental temperature. The suppression is based on the fact that in a system with two accessible clock transitions (with frequencies ${\ensuremath{\nu}}_{1}$ and ${\ensuremath{\nu}}_{2}$) which are exposed to the same thermal environment, there exists a ``synthetic'' frequency ${\ensuremath{\nu}}_{\mathrm{syn}}$ $\ensuremath{\propto}$ (${\ensuremath{\nu}}_{1}\ensuremath{-}{\ensuremath{\epsilon}}_{12}{\ensuremath{\nu}}_{2}$) largely immune to the blackbody radiation shift. For example, in the case of $^{171}\mathrm{Yb}^{+}$ it is possible to create a synthetic-frequency-based clock in which the fractional blackbody radiation shift can be suppressed to the level of ${10}^{\ensuremath{-}18}$ in a broad interval near room temperature ($300\ifmmode\pm\else\textpm\fi{}15\text{ }\text{ }\mathrm{K}$). We also propose a realization of our method with the use of an optical frequency comb generator stabilized to both frequencies ${\ensuremath{\nu}}_{1}$ and ${\ensuremath{\nu}}_{2}$, where the frequency ${\ensuremath{\nu}}_{\mathrm{syn}}$ is generated as one of the components of the comb spectrum.We develop a concept of atomic clocks where the blackbody radiation shift and its fluctuations can be suppressed by 1--3 orders of magnitude independent of the environmental temperature. The suppression is based on the fact that in a system with two accessible clock transitions (with frequencies ${\ensuremath{\nu}}_{1}$ and ${\ensuremath{\nu}}_{2}$) which are exposed to the same thermal environment, there exists a ``synthetic'' frequency ${\ensuremath{\nu}}_{\mathrm{syn}}$ $\ensuremath{\propto}$ (${\ensuremath{\nu}}_{1}\ensuremath{-}{\ensuremath{\epsilon}}_{12}{\ensuremath{\nu}}_{2}$) largely immune to the blackbody radiation shift. For example, in the case of $^{171}\mathrm{Yb}^{+}$ it is possible to create a synthetic-frequency-based clock in which the fractional blackbody radiation shift can be suppressed to the level of ${10}^{\ensuremath{-}18}$ in a broad interval near room temperature ($300\ifmmode\pm\else\textpm\fi{}15\text{ }\text{ }\mathrm{K}$). We also propose a realization of our method with the use of an optical frequency comb generator stabilized to both frequencies ${\ensuremath{\nu}}_{1}$ and ${\ensuremath{\nu}}_{2}$, where the frequency ${\ensuremath{\nu}}_{\mathrm{syn}}$ is generated as one of the components of the comb spectrum.

arXiv:1103.0760Physical Review LettersJul 14, 201148 citations

Blackbody Radiation, Atomic Emission, and Lasers

Karl D. Möller

Springer eBooksJan 1, 20030 citations

Blackbody Radiation, Atomic Emission, and Lasers

Springer eBooksSep 5, 20070 citations

Accurate Determination of Blackbody Radiation Shifts in a Strontium Molecular Lattice Clock

Brandon Iritani, Emily Tiberi, Wojciech Skomorowski +3 more

Molecular lattice clocks enable the search for new physics, such as fifth forces or temporal variations of fundamental constants, in a manner complementary to atomic clocks. Blackbody radiation (BBR) is a major contributor to the systematic error budget of conventional atomic clocks and is notoriously difficult to characterize and control. Here, we combine infrared Stark-shift spectroscopy in a molecular lattice clock and modern quantum chemistry methods to characterize the polarizabilities of the Sr_{2} molecule from dc to infrared. Using this description, we determine the static and dynamic blackbody radiation shifts for all possible vibrational clock transitions to the 10^{-16} level. This constitutes an important step toward millihertz-level molecular spectroscopy in Sr_{2} and provides a framework for evaluating BBR shifts in other homonuclear molecules.Molecular lattice clocks enable the search for new physics, such as fifth forces or temporal variations of fundamental constants, in a manner complementary to atomic clocks. Blackbody radiation (BBR) is a major contributor to the systematic error budget of conventional atomic clocks and is notoriously difficult to characterize and control. Here, we combine infrared Stark-shift spectroscopy in a molecular lattice clock and modern quantum chemistry methods to characterize the polarizabilities of the Sr_{2} molecule from dc to infrared. Using this description, we determine the static and dynamic blackbody radiation shifts for all possible vibrational clock transitions to the 10^{-16} level. This constitutes an important step toward millihertz-level molecular spectroscopy in Sr_{2} and provides a framework for evaluating BBR shifts in other homonuclear molecules.

arXiv:2306.00981Physical Review LettersDec 26, 20234 citations

^{171}\mathrm{Yb}^{+}

it is possible to create a synthetic-frequency-based clock in which the fractional blackbody radiation shift can be suppressed to the level of ${10}^{\ensuremath{-}18}$ in a broad interval near room temperature ($300\ifmmode\pm\else\textpm\fi{}15\text{ }\text{ }\mathrm{K}$). We also propose a realization of our method with the use of an optical frequency comb generator stabilized to both frequencies ${\ensuremath{\nu}}_{1}$ and ${\ensuremath{\nu}}_{2}$, where the frequency ${\ensuremath{\nu}}_{\mathrm{syn}}$ is generated as one of the components of the comb spectrum.