Heidelberg 2015 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 10: Quantum Information: Concepts and Methods II
Q 10.1: Group Report
Monday, March 23, 2015, 14:30–15:00, K/HS1
Good News for Controlling Closed and Open Quantum Systems — •Thomas Schulte-Herbrüggen1, Ville Bergholm2, Corey O’Meara1, Luca Arceci1,3, Gunther Dirr4, Moritz August5, and Thomas Huckle5 — 1Dept. Chem., TU-München — 2ISI Foundation, Torino — 3Dept. Mathematics, TU-München — 4Math. Inst., University of Würzburg — 5Dept. Computer Science, TU-München
Optimal control is proving more and more indispensable for steering quantum devices with high fidelity. Recent examples in NV centres include error correction [1], where single-shot readouts with up to 99.6% fidelity were obtained. Another experiment implemented entanglement of distant NV centres [2] with fidelities of over 82%.
Here we report on latest examples extending the optimal-control platform dynamo [3]. They include switchable noise [4] and recent results on fixed-point engineering as well their implications for reachability under open-loop versus closed-loop control designs.
References:
[1] G. Waldherr et al., Nature 504, 204 (2014).
[2] F. Dolde et al., Nature Commun. 5, 3371 (2014).
[3] S. Machnes et al., Phys. Rev. A 84, 022305 (2011).
[4] V. Bergholm and T. Schulte-Herbrüggen, arXiv:1206.4945