Quantum Technology GroupCopyright: F. Haupt
The Quantum Technology Group is dedicated to the experimental investigation of semiconductor spin-qubits and to scanning SQUID spectroscopy.
The research effort on semiconductor spin-qubits is mostly based on gate-defined quantum dots in GaAs and SiGe, but it also explores other types of Si qubits and more "exotic" host materials for spin qubits, such as ZnSe. The goal is to assess the ultimate potential of these types of qubits as hardware for quantum computer and for quantum networking.
This effort is complemented by activities that tackle problems related to the scalability of qubit architectures, such as material growth homogeneity, device fabrication yield, the exploration of cryogenic qubit control systems and the development of efficient automated methods for tuning qubits.
The activity on scanning SQUID spectroscopy is based on a SQUID microscope operating at temperatures down to 20 mK and optimized for high frequency measurements. The high sensitivity of this instrument makes it a perfect tool for the investigation of quantum phenomena such as persistent currents, molecular magnets and surface spins.