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Q: Fachverband Quantenoptik und Photonik

Q 41: Poster: Quantum Optics and Photonics II

Q 41.12: Poster

Mittwoch, 13. März 2019, 16:15–18:15, S Fobau Physik

Technological Advances in Trapped Ion Quantum Processing Nodes — •Alexander Stahl, Björn Lekitsch, Janine Nicodemus, Daniël Pijn, Vidyut Kaushal, Oliver Gräb, Andreas Conta, Ulrich Poschinger, and Ferdinand Schmidt-Kaler — Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany

We present technological advances towards a fault tolerant shuttling-based trapped-ion quantum processing node. Recently we have successfully demonstrated four-qubit GHZ states using sequential entangling gates [1] and a dc magnetometer with quantum enhanced performance [2]. One essential component to realise these experiments is a custom-made high-speed multi-channel waveform generator. Voltage waveforms required for such operations are computed using a versatile software framework, which is capable of automatically generating optimized waveforms for various ion transport operations. We also report advances made on the generation of the quantizing magnetic field and its stability, using alignable permanent magnets inside a mu-metal chamber, which is essential to reach high coherence times [3]. Finally, we will present results of ongoing work on a fault-tolerant error syndrome measurement scheme using six trapped-ions.

[1] H. Kaufmann et al., Phys. Rev. Lett. 119, 150503 (2017)

[2] T. Ruster et al., Phys. Rev. A 90, 033410, 033410 (2014)

[3] T. Ruster et al., Appl. Phys. B 122:254 (2016)