Hannover 2020 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 30: Ultra-cold atoms, ions, and BEC VII (joint session A/Q)

A 30.4: Vortrag

Freitag, 13. März 2020, 12:00–12:15, f303

State-dependent optical lattices for the clock states of strontium — •Annie Jihyun Park1, Andre Heinz1, Trautmann Jan1, Neven Santic1, Sergey G Porsev2,3, Marianna S Safronova2,4, Immanuel Bloch1,5, and Sebastian Blatt11Max Planck Institute of Quantum Optics, Garching, Germany — 2U. Delaware, Newark, USA — 3Petersburg Nuclear Physics Institute, Gatchina, Russia — 4JQI, NIST and U. Maryland, College Park, USA — 5LMU, Munich, Germany

We demonstrate state-dependent optical lattice for the clock states in strontium at the tune-out wavelength for the 1S0 ground state, where its dipole polarizability vanishes. Using a novel spectroscopic method, we measure 689.222225(14) nm for this tune-out wavelength in Sr-88, one of the most precise and accurate measurements of a tune-out wavelength to date. Since our method does not require quantum degenerate gases, it is also suited for measuring tune-out wavelengths for atoms in metastable states, molecules, fermionic species and trapped ions. Furthermore, we measure the polarizability of the excited 3P0 clock state at the tune-out wavelength using high-resolution clock spectroscopy, demonstrating the first excited state polarizability measurement in an alkaline-earth-metal atom. In a proof-of-principle experiment, we trap 3P0 atoms in a one-dimensional optical lattice at the tune-out wavelength. Our measurements benchmark state-of-the-art atomic structure calculations and pave the way for state-dependent manipulations of strontium atoms for high-fidelity quantum simulations and quantum computation schemes.

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