Berlin 2018 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 50: HL Poster IV
HL 50.11: Poster
Thursday, March 15, 2018, 19:00–21:00, Poster B
Towards an Optical Interface to Spin Qubits in GaAs — •Zheng Zeng1, Arne Ludwig2, Eva Groß1, Hendrik Bluhm3, and Beata Kardynał1 — 1Peter Grünberg Institute (PGI-9), Forschungszentrum Jülich, D-52425 Jülich, Germany — 2Lehrstuhl für Angewandte Festkörperphysik, Ruhr-Universität Bochum, D-44780 Bochum, Germany — 3JARA-Institute for Quantum Information, RWTH Aachen University, D-52074 Aachen, Germany
Connecting quantum information processors over long distances would enable quantum networks and more complex quantum computing architectures. Spin qubits in GaAs/AlGaAs gate-defined quantum dots (GDQDs) have been demonstrated to be promising scalable qubits. Since GaAs is a direct band gap material, a coherent transfer of information between a spin qubit and a photon qubit is in principle possible but cannot be achieved directly using GDQDs. We pursue an approach where an InAs self-assembled quantum dot (SAQD) facilitates a coherent transfer of a energy encoded photon qubit into a singlet-triplet spin qubit. We briefly analyse the device operation principle and conditions necessary to achieve high fidelity transfer. We will report on our progress on device fabrication with an emphasis on the alignment between the quantum dots and incorporation of back gates for tuning the electric field in the device.