Optical lattice clocks toward 10-17 uncertainty

M. Takamoto; T. Akatsuka; H. Hachisu; H. Katori

doi:10.1117/12.825979

25 August 2009 Optical lattice clocks toward 10^-17 uncertainty

M. Takamoto, T. Akatsuka, H. Hachisu, H. Katori

Proceedings Volume 7431, Time and Frequency Metrology II; 74310I (2009) https://doi.org/10.1117/12.825979
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

Abstract

We discuss two possible configurations for optical lattice clocks; a one-dimensional (1D) lattice loaded with spinpolarized fermions, and a three-dimensional (3D) lattice loaded with bosons. In the former scheme, collisional frequency shifts are suppressed by the quantum statistical property of identical fermions. This Pauli blocking of collisions is critically dependent on the degree of spin polarization of the fermionic atoms, which we carefully investigated in the Rabi excitation process of the clock transition. In the latter scheme, a single occupancy lattice suppresses bunching of bosons and collisional frequency shifts. We demonstrate a frequency comparison of these two optical lattice clocks based on fermionic ⁸⁷Sr and bosonic ⁸⁸Sr. Operating these clocks parallely has yielded a stability approaching 10⁻¹⁷. Such measurements are an important step to ascertain the lattice clocks' uncertainty at the 10⁻¹⁷ level and beyond.

Citation Download Citation

M. Takamoto, T. Akatsuka, H. Hachisu, and H. Katori "Optical lattice clocks toward 10^-17 uncertainty", Proc. SPIE 7431, Time and Frequency Metrology II, 74310I (25 August 2009); https://doi.org/10.1117/12.825979

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