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

Abstract

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 towards mHz-level molecular spectroscopy in Sr${}_2$, and provides a framework for evaluating BBR shifts in other homonuclear molecules.

arXiv comment7 pages, 4 figures, added supplemental with 3 extra figures

References in corpus (36)

• Stimulated Raman adiabatic passage in physics, chemistry and beyond
• Systematic evaluation of an atomic clock at 2e-18 total uncertainty
• Atomic clock performance beyond the geodetic limit
• Theory and applications of atomic and ionic polarizabilities
• JILA SrI Optical Lattice Clock with Uncertainty of $2.0\times 10^{-18}$
• Multipolar theory of black-body radiation shift of atomic energy levels and its implications for optical lattice clocks
• Experimenting an optical second with strontium lattice clocks
• A transportable optical lattice clock with $7\times 10^{-17}$ uncertainty
• Two-color photoassociation spectroscopy of ytterbium atoms and the precise determinations of s-wave scattering lengths
• Improved limits for violations of local position invariance from atomic clock comparisons
• Enhanced sensitivity to variation of $m_e/m_p$ in molecular spectra
• A strontium lattice clock with $3\times 10^{-17}$ inaccuracy and its frequency
• First observation with global network of optical atomic clocks aimed for a dark matter detection
• Probing QED and fundamental constants through laser spectroscopy of vibrational transitions in HD+
• High accuracy correction of blackbody radiation shift in an optical lattice clock
• Blackbody radiation shift in the Sr optical atomic clock
• Polyatomic Molecules as Quantum Sensors for Fundamental Physics
• Narrow Line Photoassociation in an Optical Lattice
• Two-photon photoassociative spectroscopy of ultracold 88-Sr
• Molecular lattice clock with long vibrational coherence
• Blackbody radiation shift assessment for a lutetium ion clock
• The ^1S+^1S asymptote of Sr_2 studied by Fourier-transform spectroscopy
• Bounds on fifth forces at the sub-Angstrom length scale
• Measuring the stability of fundamental constants with a network of clocks
• Measurement of the variation of electron-to-proton mass ratio using ultracold molecules produced from laser-cooled atoms
• On a definition of the SI second with a set of optical clock transitions
• The unit of time: present and future directions
• Thermometry via Light Shifts in Optical Lattices
• A terahertz vibrational molecular clock with systematic uncertainty at the $10^{-14}$ level
• Pendellösung Interferometry Probes the Neutron Charge Radius, Lattice Dynamics, and Fifth Forces
• High-precision spectroscopy of ultracold molecules in an optical lattice
• Optical lattice clocks with weakly bound molecules
• Ultracold ${}^{88}{\mathrm{Sr}}_2$ molecules in the absolute ground state
• Effect of alpha variation on the vibrational spectrum of Sr_2
• Improved Frequency Ratio Measurement with 87Sr and 171Yb Optical Lattice Clocks at NMIJ
• Transition strength measurements to guide magic wavelength selection in optically trapped molecules

Cited by in corpus (1)

• Searching for New Fundamental Interactions via Isotopic Shifts in Molecular Lattice Clocks