Dresden 2020 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 39: Materials and devices for quantum technology II

HL 39.5: Talk

Wednesday, March 18, 2020, 10:45–11:00, POT 112

High-frequency electronics for quantum technologies — •Kai J. Spychala, Alex Widhalm, Björn Jonas, Sebastian Krehs, Dirk Reuter, and Artur Zrenner — Department of Physics, University of Paderborn, Warburger Str. 100, D-33098 Paderborn, Germany

The implementation of quantum effects in computation, simulation, sensing and communication in commercial technology requires a miniaturization and standardization effort which interfaces it with current technology. A very important aspect for scalability is the implementation of state of the art electronics in order to provide a link to the known digital technologies. As quantum phenomena are mostly short-lived and observed under cryogenic environments, robust high-frequency electronics which can operate in the cryogenic regime is needed. Further, the integration between quantum systems and high-frequency electronics plays an important role.
We show results on the ultrafast electric phase manipulation of an exciton qubit [1], the rapid adiabatic passage of an exciton qubit and present a scheme for Ramsey-based optoelectronic sampling. Additionally, we present electronics for a spin-photon interface which consists of a QD molecule controlled by a BiCMOS chip. Our chip generates electric pulses in order to entangle the spins of the electrons trapped in the QD molecule.

Ref: [1] A.Widhalm et al., APL112, 111105(2018)