The absolute frequency of the 87Sr optical clock transition

Abstract

The absolute frequency of the 1S0-3P0 clock transition of 87Sr has been measured to be 429 228 004 229 873.65 (37) Hz using lattice-confined atoms, where the fractional uncertainty of 8.6x10-16 represents one of the most accurate measurements of an atomic transition frequency to date. After a detailed study of systematic effects, which reduced the total systematic uncertainty of the Sr lattice clock to 1.5x10-16, the clock frequency is measured against a hydrogen maser which is simultaneously calibrated to the US primary frequency standard, the NIST Cs fountain clock, NIST-F1. The comparison is made possible using a femtosecond laser based optical frequency comb to phase coherently connect the optical and microwave spectral regions and by a 3.5 km fiber transfer scheme to compare the remotely located clock signals.

References in corpus (26)

• Sr lattice clock at 1x10^{-16} fractional uncertainty by remote optical evaluation with a Ca clock
• New Limits to the Drift of Fundamental Constants from Laboratory Measurements
• Quantum State Engineering and Precision Metrology using State-Insensitive Light Traps
• Compact, thermal-noise-limited optical cavity for diode laser stabilization at 1 x 10-15
• New Limits on Coupling of Fundamental Constants to Gravity Using ${}^{87}$Sr Optical Lattice Clocks
• A Search for Variations of Fundamental Constants using Atomic Fountain Clocks
• New limit on the present temporal variation of the fine structure constant
• Multipolar theory of black-body radiation shift of atomic energy levels and its implications for optical lattice clocks
• Cold atom Clocks and Applications
• Nuclear Spin Effects in Optical Lattice Clocks
• ${}^{87}$Sr lattice clock with inaccuracy below 10${}^{-15}$
• Systematic study of the ${}^{87}$Sr clock transition in an optical lattice
• Dependence of nuclear magnetic moments on quark masses and limits on temporal variation of fundamental constants from atomic clock experiments
• Optical atomic coherence at the one-second time scale
• Optical Lattice Induced Light Shifts in an Yb Atomic Clock
• Coherent optical phase transfer over a 32-km fiber with 1-s instability at $10^{-17}$
• An accurate optical lattice clock with 87Sr atoms
• Improved frequency measurement of a one-dimensional optical lattice clock with a spin-polarized fermionic ${}^{87}$Sr isotope
• Hyperpolarizability effects in a Sr optical lattice clock
• Properties of metastable alkaline-earth-metal atoms calculated using an accurate effective core potential
• Hyperfine quenching of the metastable ${}^3{P}_{0,2}$ states in divalent atoms
• An Optical Lattice Clock with Spin-polarized 87Sr Atoms
• Accuracy Evaluation of an Optical Lattice Clock with Bosonic Atoms
• Narrow Line Cooling: Finite Photon Recoil Dynamics
• Accurate calculations of Sr properties for a high-accuracy optical clock
• The optical calcium frequency standards of PTB and NIST

Cited by in corpus (62)

• An Optical Lattice Clock with Accuracy and Stability at the $10^{-18}$ Level
• Frequency Comparison of Two High-Accuracy Al+ Optical Clocks
• Geodesy and metrology with a transportable optical clock
• Theory and applications of atomic and ionic polarizabilities
• JILA SrI Optical Lattice Clock with Uncertainty of $2.0\times 10^{-18}$
• Atomic Clocks for Geodesy
• Colloquium: Physics of optical lattice clocks
• Comparison of Two Independent Sr Optical Clocks with 1e-17 Stability at 10^3 s
• Suppression of collisional shifts in a strongly interacting lattice clock
• A strontium lattice clock with $3\times 10^{-17}$ inaccuracy and its frequency
• Rabi Spectroscopy and Excitation Inhomogeneity in a 1D Optical Lattice Clock
• High precision differential clock comparisons with a multiplexed optical lattice clock
• High accuracy correction of blackbody radiation shift in an optical lattice clock
• Blackbody radiation shift in the Sr optical atomic clock
• Realization of a time-scale with an accurate optical lattice clock
• The 87-Sr optical frequency standard at PTB
• Probing Interactions between Ultracold Fermions
• Measuring the frequency of a Sr optical lattice clock using a 120-km coherent optical transfer
• Direct Comparison of Distant Optical Lattice Clocks at the $10^{-16}$ Uncertainty
• Entanglement-enhanced quantum metrology: from standard quantum limit to Heisenberg limit
• Optical to microwave clock frequency ratios with a nearly continuous strontium optical lattice clock
• Microscopic Theory of Scattering of Weak Electromagnetic Radiation by a Dense Ensemble of Ultracold Atoms
• Collisional losses, decoherence, and frequency shifts in optical lattice clocks with bosons
• Optical spectrum analyzer with quantum limited noise floor
• Demonstration of a time scale based on a stable optical carrier
• Blackbody-radiation shift in a 88Sr+ ion optical frequency standard
• Near-resonance Light Scattering from a High-density, Ultracold Atomic ${}^{87}$Rb Gas
• Direct comparison of a Ca+ single ion clock against a Sr optical lattice clock
• Dispersion of the dielectric permittivity of dense and ultracold atomic gases
• Contributing to TAI with a Secondary Representation of the SI Second
• Scattering of Cold Atom Coherences by Hot Atoms: Frequency Shifts from Background Gas Collisions
• Spontaneous decay of an atom excited in a dense and disordered atomic ensemble: quantum microscopic approach
• A superradiant clock laser on a magicwavelength optical lattice
• Hertz-level Measurement of the 40Ca+ 4s 2S1/2-3d 2D5/2 Clock Transition Frequency With Respect to the SI Second through GPS
• Long term measurement of the ${}^{87}$Sr clock frequency at the limit of primary Cs clocks
• Inelastic collisions and density-dependent excitation suppression in a ${}^{87}$Sr optical lattice clock
• Lorentz and CPT Tests with Clock-Comparison Experiments
• A compact and efficient strontium oven for laser-cooling experiments
• Stability Transfer between Two Clock Lasers Operating at Different Wavelengths for Absolute Frequency Measurement of Clock Transition in 87Sr
• Optimized geometries for future generation optical lattice clocks
• Spectroscopy and frequency measurement of the ${}^{87}$Sr clock transition by laser linewidth transfer using an optical frequency comb
• A strontium optical lattice clock with $1\times 10^{-17}$ uncertainty and measurement of its absolute frequency
• Intermittent optical frequency measurements to reduce the dead time uncertainty of frequency link
• Frequency ratio measurement of 171Yb and 87Sr optical lattice clocks
• Magic Wavelengths for Terahertz Clock Transitions
• Colloquium: Comparison of Astrophysical and Terrestrial Frequency Standards
• Spatial distribution of optically induced atomic excitation in a dense and cold atomic ensemble
• Demonstration of the nearly continuous operation of an ${}^{171}$Yb optical lattice clock for half a year
• A low maintenance Sr optical lattice clock
• Probing new physics using Rydberg states of atomic hydrogen
• Zeeman Slowers for Strontium based on Permanent Magnets
• Resolved atomic interaction sidebands in an optical clock transition
• Long range transport of ultra cold atoms in a far-detuned 1D optical lattice
• Testing ultrafast mode-locking at microhertz relative optical linewidth
• Dual-Mode Operation of an Optical Lattice Clock Using Strontium and Ytterbium Atoms
• A 3-photon process for producing a degenerate gas of metastable alkaline-earth atoms
• Spin-orbit coupled correlated metal phase in Kondo lattices: an implementation with alkaline-earth atoms
• Designing Zeeman slower for strontium atoms - towards optical atomic clock
• Towards Adoption of an Optical Second: Verifying Optical Clocks at the SI Limit
• Optical Stern-Gerlach effect via a single traveling-wave light
• Tackling the blackbody shift in a strontium optical lattice clock
• Simulation of optical lattice trap loading from a cold atomic ensemble