A terahertz vibrational molecular clock with systematic uncertainty at the $10^{-14}$ level

Abstract

Neutral quantum absorbers in optical lattices have emerged as a leading platform for achieving clocks with exquisite spectroscopic resolution. However, the studies of these clocks and their systematic shifts have so far been limited to atoms. Here, we extend this architecture to an ensemble of diatomic molecules and experimentally realize an accurate lattice clock based on pure molecular vibration. We evaluate the leading systematics, including the characterization of nonlinear trap-induced light shifts, achieving a total systematic uncertainty of $4.6\times 10^{-14}$. The absolute frequency of the vibrational splitting is measured to be 31 825 183 207 592.8(5.1) Hz, enabling the dissociation energy of our molecule to be determined with record accuracy. Our results represent an important milestone in molecular spectroscopy and THz-frequency standards, and may be generalized to other neutral molecular species with applications for fundamental physics, including tests of molecular quantum electrodynamics and the search for new interactions.

17 pages, 8 figures

References in corpus (33)

• Systematic evaluation of an atomic clock at 2e-18 total uncertainty
• Resolving the gravitational redshift within a millimeter atomic sample
• Ultra-stable optical clock with two cold-atom ensembles
• Multipolar theory of black-body radiation shift of atomic energy levels and its implications for optical lattice clocks
• Precision Test of Mass Ratio Variations with Lattice-Confined Ultracold Molecules
• New frontiers with quantum gases of polar molecules
• Stability of the proton-to-electron mass ratio
• High precision differential clock comparisons with a multiplexed optical lattice clock
• Proton-Electron Mass Ratio from Laser Spectroscopy of HD${}^{+}$ at the Part-Per-Trillion Level
• An atomic clock with $1\times 10^{-18}$ room-temperature blackbody Stark uncertainty
• Creation of ultracold Sr2 molecules in the electronic ground state
• Operational Magic Intensity for Sr Optical Lattice Clocks
• Hyperpolarizability and operational magic wavelength in an optical lattice clock
• Rotational Coherence Times of Polar Molecules in Optical Tweezers
• Proton-electron mass ratio by high-resolution optical spectroscopy of ion ensembles in the resolved-carrier regime
• QCL-based frequency metrology from the mid-infrared to the THz range: a review
• Measuring the stability of fundamental constants with a network of clocks
• Rovibrational dynamics of the strontium molecule in the A^1Σ_u^+, c^3Π_u, and a^3Σ_u^+ manifold from state-of-the-art ab initio calculations
• CeNTREX: A new search for time-reversal symmetry violation in the ${}^{205}$Tl nucleus
• Probing Fundamental Symmetries of Deformed Nuclei in Symmetric Top Molecules
• Search for oscillations of fundamental constants using molecular spectroscopy
• Quantum control of molecules for fundamental physics
• Dynamic cancellation of ac Stark shift for pulsed EIT/Raman optical lattice clocks
• An ultracold molecular beam for testing fundamental physics
• Thermometry via Light Shifts in Optical Lattices
• Enriching the quantum toolbox of ultracold molecules with Rydberg atoms
• Precise determination of the isotope shift of ${}^{88}$Sr - ${}^{87}$Sr optical lattice clock by sharing perturbations
• Formation of deeply bound ultracold Sr_2 molecules by photoassociation near the ^1S + ^3P_1 intercombination line
• Sub-recoil clock-transition laser cooling enabling shallow optical lattice clocks
• Ultracold ${}^{88}{\mathrm{Sr}}_2$ molecules in the absolute ground state
• Coherent optical creation of a single molecule
• Improved Ionization and Dissociation Energies of the Deuterium Molecule
• Modeling motional energy spectra and lattice light shifts in optical lattice clocks

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