Experimental projectsCopyright: © Rene Otten
M.Sc. Project Spin Qubit Readout using Cryogenic Amplifiers
In this project, you will establish spin qubit readout using cryogenic amplification in our group. You will adopt findings from previous work into an experimental setup to improve the readout speed of our qubits by utilizing transistors at mK temperatures. Further, you will evaluate different amplifier designs and transistor types for their suitability for this talk in the future.Copyright: © Struck/Jhih-Sian
M.Sc. Project High Throughput Spin Qubit Device Characterization
In this project, you will develop and improve methods for fast and high-throughput characterisation of Si/SiGe quantum dot devices. These methods are of great importance to quickly evaluate device performance to give fast feedback to industrial fabrication. You will measure on low temperature setups at 4K and 10mK and work on soft- as well as hardware.Copyright: © Otten/Surrey
B.Sc. Project Thermal Solutions for Large Scale Quantum Computing
In this project, you will perform thermal simulations of our experiments in order to gain insights on the performance and constraints for large scale quantum computing. You will devise an experiment to gather the necessary low temperature data needed for a cryo-toolkit for spin qubits. This knowledge is essential for future quantum processors.Copyright: © Otten/Surrey
M.Sc. Project Cryogenic DACs for Spin Qubit Control
In this project, you will measure the performance of a custom developed cryogenic digital-to-analog converter (DAC) by connecting its outputs to the DC gate electrodes of a spin qubit. Crogenic control electronics like this DAC present a promising route for scaling qubits from lab to industrial applications.Copyright: © Kardynal
B.Sc. Project Dark-field microscopy for resonant excitation of self-assembled quantum dots
In this project, you will develop dark-field optical microscopy setup based on polarization optics. You will use it to characterise properties of the InAs quantum dots under resonant excitation. To achieve this goal you will add the polarization optics in the existing micro-photoluminescence setup and develop an algorithm to align it for a maximum signal to background ratio.
Project description (PDF) Contact: Prof. Beata Kardynal
M.Sc. Project: Time Multiplexed Optical Qubit Readout
In this project, you will be designing optical cavities to facilitate the collection of photons emitted by quantum dots into optical fibers. This project is part of a new activity initiated by the Chair of Integrated Photonics (IPH) together with the Quantum Technology Group on time-interleaved (multiplexed) optical readout of quantum dots.
Project description (PDF) Contact: Prof. Jeremy Witzens (IPH)
M.Sc. Project: Development of electron spin qubits in ZnSe using a shadow-mask technology
ZnSe exhibits ideal properties for hosting electron spin quantum bits. However, this II/VI semiconductor has not been considered for this purpose. Under supervision of Alex Pawlis (FZ Jülich), who is an expert in the growth of (Zn,Mg)Se heterostructures, you will electrically characterize (Zn,Mg)Se heterostructures and fabricate quantum dot devices.
We are always happy about unsolicited applications. Please contact the principal investigator with whom you'd like to work to discuss possible projects.