Rostock 2019 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 41: Poster: Quantum Optics and Photonics II

Q 41.37: Poster

Wednesday, March 13, 2019, 16:15–18:15, S Fobau Physik

Dynamical decoupling of Erbium spins in Yttrium Orthosilicate — •Pablo Cova Fariña, Bejamin Merkel, Natalia Herrera Valencia, Kutlu Kutluer, and Andreas Reiserer — Max Planck Institute of Quantum Optics, Garching, Germany

Rare-earth doped crystals can offer coherent optical transitions and long spin coherence times and are therefore an interesting candidate for quantum repeater protocols. Among the rare-earths, Erbium stands out as it exhibits optical transitions at a telecom wavelength, offering unique potential for constructing global quantum networks using optical fibers. Unfortunately, the strong effective g-factor of Erbium spins makes them sensitive to interactions with the environment and with one another, which leads to a reduction of the electronic spin coherence time down to a few microseconds. This challenge can be overcome by applying tailored sequences of microwave pulses to achieve dynamical decoupling. Building on such techniques, we will present simulations and the current status of an experiment that aims at achieving long coherence times of the electronic spins in Er:YSO.