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Q: Fachverband Quantenoptik und Photonik
Q 13: Posters: Quantum Optics and Photonics I
Q 13.62: Poster
Montag, 9. März 2020, 16:30–18:30, Empore Lichthof
Coherent control of ions in a surface trap using Raman lasers — •Benjamin Wilhelm1, Lukas Gerster1, Pavel Hrmo1, Martin van Mourik1, Philipp Schindler1, Thomas Monz1, and Rainer Blatt1,2 — 1Institut für Experimentalphysik, Universität Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria — 2Institut für Quantenoptik und Quanteninformation, Österreichische Akademie der Wissenschaften, Technikerstr. 21A, 6020 Innsbruck, Austria
Trapped atomic ions offer an advanced platform to realise universal gate operations for performing arbitrary quantum computation. One remaining major challenge is scaling up the number of qubits, such that quantum error correction on logical qubits may be performed. We use a cryogenically cooled planar surface trap with multiple trapping zones as an approach to overcome this challenge. This setup supports the confinement of two ion species, 40Ca+ and 88Sr+. By using the 40Ca+-ion as an optical qubit, we are able to reach estimated coherence times up to 20 ms and create maximally entangled 40Ca+-40Ca+ states with fidelities of 98.5(5) %. We plan on using the second species for recooling the motional modes of the ion string. Here we present a Raman beam setup to extend the coherent control of our system to ground state qubits.