Regensburg 2022 – scientific programme

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QI: Fachverband Quanteninformation

QI 5: Implementations: Solid state systems

QI 5.3: Talk

Tuesday, September 6, 2022, 10:15–10:30, H8

Fidelities of quantum algorithms for a spin register in diamond in presence of magnetic impurities. — •Dominik Maile, Jürgen Stockburger, and Joachim Ankerhold — Institut für komplexe Quantensysteme, Universität Ulm, Germany

The Nitrogen Vacancy Center in diamond coupled to addressable surrounding nuclear spins forms a versatile building block for future quantum technologies. We theoretically study quantum information protocols of a small spin register built out of this constituents in presence of a common bath of impurity spins. Using a cluster correlation expansion, we predict the coherence and relaxation properties as well as the fidelities for different quantum algorithms. Further, we study the influence of the volume density and the geometry of the spin bath consisting of substitutional nitrogen atoms. Our investigations yield insight how to efficiently use such a platform for quantum information purposes in presence of unavoidable magnetic impurities.