Erlangen 2018 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 62: Poster: Quantum Optics and Photonics V
Q 62.42: Poster
Thursday, March 8, 2018, 16:15–18:15, Redoutensaal
Towards a test of Local Lorentz Symmetry with 172Yb+ ions — •Chih-Han Yeh, André P. Kulosa, Alexandre Didier, Dimitri Kalincev, Jan Kiethe, Tabea Nordmann, Nimrod Hausser, and Tanja E. Mehlstäubler — Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38166 Braunschweig, Germany
We report on an experiment to be carried out with two entangled 172Yb+ ions which tests the Local Lorentz Invariance (LLI) in the electron-photon sector. The relevant states we use for the LLI test are the 4f136s2 2F7/2 (mJ=|1/2| and mJ=|7/2|) substates that have orthogonal orientations which respond differently to the Lorentz-violating effect quantified by the cµν′ tensor. This will cause the energy difference between them to change as the Earth rotates with respect to the Sun-centered frame. The ions must be prepared in a decoherence-free subspace before being mapped onto the 2F7/2 state, since magnetic field noise will destroy the ions’ state coherence. The entanglement in the 2F7/2 state can be prepared in three theoretically promising ways: 1. via Mølmer Sørensen Gate; 2. preparing a product state which dephases into a mixed state[1]; 3. using two-frequency bichromatic laser to map the ions directly onto the 2F7/2 state[2].
Currently we are setting up the 934nm laser which will be frequency doubled into a 467nm laser for interrogation of the octupole transition in 172Yb+.
[1] T. Pruttivarasin et al., Nature 517, 592-595 (2015).
[2] V. A. Dzuba et al., Nature Physics 12, 465-468 (2016).