Berlin 2018 – wissenschaftliches Programm
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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur
KFM 13: Diamond I
KFM 13.8: Vortrag
Mittwoch, 14. März 2018, 12:30–12:50, E 020
Holonomic Quantum Control of the state of an NV-center in Diamond — •Vlad Shkolnikov1, Brian Zhou2, Paul Jerger2, Joseph Heremans2,3, Guido Burkard1, and David Awschalom2,3 — 1Department of Physics, University of Konstanz, D-78457 Konstanz, Germany — 2Institute for Molecular Engineering, University of Chicago, Chicago, Illinois 60637, USA — 3Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
Geometric phases arising from cyclic evolution of quantum systems open new strategies for constructing robust quantum technologies. Here, we demonstrate arbitrary single qubit holonomic gates from a single cycle of nonadiabatic evolution of the electron spin of an NV-center [1]. Our method varies the amplitude, phase, and detuning of a two-tone optical field to gain full control over the state of the qubit with arbitrary rotation axes and angles. We analyze the robustness of detuned gates using the Lindblad formalism and show the gate fidelity to be mostly defined by the lifetime of the excited state of the NV. We experimentally and theoretically prove that single cycle gates are better than those consisting of two concatenated cycles.
[1] Brian B. Zhou, Paul C. Jerger, V.O. Shkolnikov, F. Joseph Heremans, Guido Burkard, and David D. Awschalom Phys. Rev. Lett. 119, 140503