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Q: Fachverband Quantenoptik und Photonik

Q 41: Quantum Information (Quantum Communication and Quantum Repeater) I

Q 41.3: Vortrag

Donnerstag, 12. März 2020, 11:45–12:00, e001

Development of Single Photon Quantum Frequency Conversion for Quantum Computing Networks — •Marcel Hohn and Simon Stellmer — Physikalisches Institut der Universität Bonn, Nussallee 12, 53115 Bonn

In recent years, numerous physical implementations of qubit systems, ranging from trapped ions to solid state quantum dots, have been realized. For reliable long-distance transport of quantum information between quantum systems, the usage of single photons as so-called flying qubits is the most convenient choice. The development of a hybrid quantum network permits to incorporate the benefits of different systems. This requires a means to convert the frequencies of these single photons between the operation frequencies of the respective platforms while preserving the quantum correlations, which is accomplished by quantum frequency conversion (QFC) via sum- and difference frequency generation (SFG/DFG) in a nonlinear material. Here we report on the development of a quantum frequency conversion setup between the Yb⁺ dipole transition at 369.5 nm and InGaAs quantum dots at about 850 nm using a waveguide in periodically poled potassium titanyl phosphate (PPKTP).