Regensburg 2022 – wissenschaftliches Programm

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QI: Fachverband Quanteninformation

QI 1: Implementations: Spin Qubits, Atoms, and Photons

QI 1.4: Vortrag

Montag, 5. September 2022, 10:30–10:45, H8

Nuclear Spin Quantum Memory in Silicon Carbide — •Benedikt Tissot1, Michael Trupke2,3, Philipp Koller2, Thomas Astner2, and Guido Burkard11Department of Physics, University of Konstanz, D-78457 Konstanz, Germany — 2Faculty of Physics, University of Vienna, Boltzmanngasse 5, 1090 Vienna, Austria — 3Institute for Quantum Optics and Quantum Information (IQOQI) Vienna, Austrian Academy of Sciences, Boltzmanngasse 3, 1090 Vienna, Austria

Transition metal (TM) defects in silicon carbide (SiC) are a promising platform for applications in quantum technology. Some TM defects, e.g. vanadium, emit in one of the telecom bands, but the large ground state hyperfine manifold poses a problem for applications which require pure quantum states. We develop a driven, dissipative protocol to polarize the nuclear spin, based on a rigorous theoretical model of the defect. We further show that nuclear-spin polarization enables the use of well-known methods for initialization and long-time coherent storage of quantum states. The proposed nuclear-spin preparation protocol thus marks the first step towards an all-optically controlled integrated platform for quantum technology with TM defects in SiC.

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