Experimental projects

  Schematic of the readout circuit using a heterojunction bipolar transistor Copyright: © 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.

Project description (PDF)

  T-junction Copyright: © Ran Xue

M.Sc. Project Single electron transport in a quantum-bus T-junction in Si/SiGe​

In this project, you will develop new characterization benchmarks for non-linear shuttling devices (T-Junction). Utilizing those, as well as your acquired knowledge about measurement techniques, you identify promising devices which you will then experiment on in a dilution refrigerator to demonstrate the capabilities of the T-Junction design.

Project description (PDF)

  Coherent Shuttling Copyright: © Klos/Schreiber

M.Sc. Project Coherent Shuttling in Isotopically Purified 28Si/SiGe

In this project, you will pioneer and improve methods on coherent electron shuttling in devices engineered for this specific usecase. These methods promise to pave the way for scalability in spin-qubit based quantum processors. You will gain experience on low temperature measurements at 4K and 30mK and work on soft- as well as hardware

Project description (PDF)

  Students Copyright: © RWTH Aachen

M.Sc. Project Development of Didactically Improved Teaching Elements in Quantum Technology

In this project, you will develop and introduce new didactic approaches to the quantum technology master’s track and evaluate their effectiveness. Possible areas of application include innovative digital learning modules and research-based teaching offers. During the project, you will collaborate with local lecturers as well as international partners of the DigiQ-Consortium.

Project description (PDF)

  Cryogenic DACs for Spin Qubit Control 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.

Project description (PDF)

  Droplet GaAs quantum dots for optical readout of spin qubits Copyright: © Beate Kardynal

M.Sc. Project Droplet GaAs quantum dots for optical readout of spin qubits​

In this project, we want to characterise the epitaxial GaAs quantum dots grown in a vicinity of the 2DEG in order to design an optimum heterostructure for the spin-photon qubit conversion. The characterisation will involve studies of optical transitions in the quantum dots, with an emphasize on the dependence of properties such as photon energy and recombination rate on the occupation of the two dimensional electron gas.
Project description (PDF)

  Optical cavity Copyright: © Witzens

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)

  Schematic of a ZnSe double quantum dot Copyright: © Schreiber

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.

Project description (PDF)


Unsolicited applications

We are always happy about unsolicited applications. Please contact the principal investigator with whom you'd like to work to discuss possible projects.