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%0 Thesis
%A Cerfontaine, Pascal
%T High-fidelity single- and two-qubit gates for two-electron spin qubits
%I RWTH Aachen University
%V Dissertation
%C Aachen
%M RWTH-2019-09348
%P 1 Online-Ressource (xiii, 166 Seiten) : Illustrationen, Diagramme
%D 2019
%Z Veröffentlicht auf dem Publikationsserver der RWTH Aachen University
%Z Dissertation, RWTH Aachen University, 2019
%X A key ingredient for fault-tolerant quantum computers are sufficiently accurate logic gates on single and multiple qubits in the presence of decohering noise. In this thesis, we theoretically develop and experimentally demonstrate such high-fidelity quantum gates for semiconductor-based quantum computing. Specifically, we consider a qubit encoded in the singlet and one triplet state of two electron spins in GaAs. While its potential for optical coupling makes GaAs an attractive material, highly auto-correlated magnetic field noise from fluctuating nuclear spins leads to considerably lower coherence times than for Si-based devices, where nuclear spins can be removed by isotopic purification. In addition to noise, the control methods used in earlier experiments are based on unrealistic approximations. For these reasons, fidelities well above 99 
%F PUB:(DE-HGF)11
%9 Dissertation / PhD Thesis
%R 10.18154/RWTH-2019-09348
%U https://publications.rwth-aachen.de/record/768380