Erlangen 2018 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 40: Poster: Quantum Optics and Photonics III

Q 40.5: Poster

Tuesday, March 6, 2018, 16:15–18:15, Zelt West

Technological Advances in Scalable Trapped Ion Quantum Computing — •Vidyut Kaushal, Janine Nicodemus, Daniël Pijn, Thomas Ruster, Björn Lekitsch, Ulrich Poschinger, and Ferdinand Schmidt-Kaler — Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany

Recent advances in trapped ion quantum technology have led to impressive results including the demonstration of four qubit GHZ states using subsequent entanglement gates [1] and a dc magnetometer with quantum enhanced sensitivity [2]. We will present the underlying technological advancements, starting with a high-speed multi-channel waveform generator developed in Mainz. The system delivers voltages and waveforms required for high-fidelity gate operations and fast ion transport, splitting and rearrangement of multiple ions. Voltage waveforms are computed using a custom developed software framework, which is capable of automatically generating ideal waveforms for various ion transport operations. In addition, we will discuss improvements of the quantizing magnetic field stability, which is critical for high qubit state coherence times. Electric coils were replaced using dual-type permanent magnets and the setup extended with a mu-metal chamber, leading to a significant improvement of coherence times [3].

[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)