Optical Lattice Induced Light Shifts in an Yb Atomic Clock

Abstract

We present an experimental study of the lattice induced light shifts on the 1S_0-3P_0 optical clock transition (v_clock~518 THz) in neutral ytterbium. The ``magic'' frequency, v_magic, for the 174Yb isotope was determined to be 394 799 475(35)MHz, which leads to a first order light shift uncertainty of 0.38 Hz on the 518 THz clock transition. Also investigated were the hyperpolarizability shifts due to the nearby 6s6p 3P_0 - 6s8p 3P_0, 6s8p 3P_2, and 6s5f 3F_2 two-photon resonances at 759.708 nm, 754.23 nm, and 764.95 nm respectively. By tuning the lattice frequency over the two-photon resonances and measuring the corresponding clock transition shifts, the hyperpolarizability shift was estimated to be 170(33) mHz for a linear polarized, 50 uK deep, lattice at the magic wavelength. In addition, we have confirmed that a circularly polarized lattice eliminates the J=0 - J=0 two-photon resonance. These results indicate that the differential polarizability and hyperpolarizability frequency shift uncertainties in a Yb lattice clock could be held to well below 10^-17.

Accepted to PRL

References in corpus (11)

• Degenerate Fermi Gases of Ytterbium
• Direct excitation of the forbidden clock transition in neutral 174Yb atoms confined to an optical lattice
• Magnetic field-induced spectroscopy of forbidden optical transitions with application to lattice-based optical atomic clocks
• ${}^{87}$Sr lattice clock with inaccuracy below 10${}^{-15}$
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• 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
• Quantum logic via the exchange blockade in ultracold collisions
• Studies of the ${}^1$S${}_0$--${}^3$P${}_0$ transition in atomic ytterbium for optical clocks and qubit arrays
• Optical Lattice Polarization Effects on Hyperpolarizability of Atomic Clock Transitions

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