Hannover 2016 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 42: Poster: Quantum Optics and Photonics III
Q 42.30: Poster
Mittwoch, 2. März 2016, 16:30–19:00, Empore Lichthof
Optimizing a quantum computer with randomized benchmarking — •Roman Stricker, Alexander Erhard, Daniel Nigg, Esteban Martinez, Philipp Schindler, Thomas Monz, and Rainer Blatt — Institute for Experimental Physics, University of Innsbruck, Austria
The realization of a quantum computer has become a major research field over the last decade. For a successfull implementation, error-sources need to be kept as small as possible. One promising way of characterizing these errors is by means of randomized benchmarking. We report on an experiment characterizing Clifford operations. The experiment is performed on a 40Ca+ ion-trap quantum computer. The goal was to implement randomly chosen sets of single-qubit gates with arbitrary lengths, where each specific set is chosen to be a self-inverting sequence. Measuring the difference between the experimental outcome and the ideal transformation leads to an estimation of the fidelity of a certain set. To obtain the fidelity of a single gate, we analyze the result of different random sequences. We use this as a tool to improve our experimental setup, such as stabilizing the lasers intensity or reducing fiber noise. We found a single-qubit fidelity of above 99%.