Experimental projects

 

Unsolicited applications

In addition to the advertised projects, we are always happy about unsolicited applications. Please contact the principal investigator with whom you'd like to work to discuss possible projects.

  Neural net Copyright: Otten

B.Sc. Project Machine Learning techniques for automated tuning of quantum dots

In this project, you will research and implement machine-learning techniques to identify certain features in a measured set of charge stability diagrams and classify the data by the number of quantum dots. The goal of this project is not only to implement first machine learning approaches and use them for automated tuning, but also to establish this knowledge in our group.

Project description (PDF)

  Typical spectra of an InAs quantum dot 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)

  GaAs sample Copyright: Cerfontaine

M.Sc. Project Experimental High-Fidelity Two-Qubit Gates for Spin Qubits

In this project you will work on the experimental demonstration and characterization of a two-qubit gate mediated by the exchange interaction. Using a sophisticated 15 mK measurement setup, you will control two qubits with advanced high-frequency control and readout electronics.

Project description (PDF) Contact: Pascal Cerfontaine

  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)

  Si-MOS device Copyright: Klos

M.Sc. Project Multi qubit Si quantum devices fabricated by industrial processes

In this project, you will fabricate and characterize the Si-MOS quantum device with state-of-the art equipment at IHT and our group. This explicitly includes the hands-on improvement and use of industrial fabrication processes in multiple research cleanroom facilities in Aachen and electrical measurements in our low temperature setups and cryostats.
Project description (PDF)

  GaAs device Copyright: Liu

M.Sc. Project The development of an optically-active gate-defined quantum dot

In this project, you will build an optical setup to conduct a systematic characterization of a new type of optically-active gate-defined quantum dot. Such quantum dot can be used to create an optical interface between flying photonic qubits and stationary spin qubits, which is a building block for quantum Internet.

Project description (PDF)

  Chevron pattern Copyright: Struck

M.Sc.-Project High fidelity manipulation and detection of a qubit in silicon

In this project you will optimise the control and read-out of a spin qubit in silicon. You will learn working with a sophisticated low-temperature measurement set-up. You will confine single electrons in a quantum dot, manipulate the electron spin by electric dipole spin resonance and improve the qubit control

Project description (PDF) Contact: Lars Schreiber

  Silicon qubit Copyright: Veldhorst et al., Nature 526, 410-414 (2015)

M.Sc. Project Characterization of silicon qubit devices fabricated on 300 mm wafers

In this project you will characterize and improve industrially manufactured MOS-type two qubit devices. These devices facilitate higher fabrication throughput and reproducibility. You will learn how to tune Si qubit devices in order to form quantum dots and gain experience in low temperature measurements at 10 mK, high frequency, low noise measurement and data analysis using python and matlab.
Project description (PDF) Contact: Lars Schreiber

  GaAs sample Copyright: Otten

M.Sc. Project 3D Integration of Semiconductor Based Spin-Qubits

In this project, you will develop a flip chip process for a 42 qubit device. Large qubit numbers require a high contact density and tight integration with control hardware, both of which can benefit from modern assembly processes. Flip-Chip bonding is a well-established in industry process and will be developed for quantum chips in this project.

Project description (PDF)

  Scanning electron micrograph of the silicon QuBus Copyright: Seidler

M.Sc.-Project Fabrication and characterization of a quantum-bus in silicon

In this project you will fabricate and characterize a single electron spin quantum bus using cutting-edge ebeam lithography at HNF (FZ Jülich) and 10 mK electronic tranport measurements at IQI, RWTH. As a first step the functionality of the single-electron charge detector at the end of the QuBus and the gate isolation is tested before single electrons can be transported.

Project description (PDF) Contact: Lars Schreiber

  Schematic of a ZnSe double quantum dot Copyright: Schreiber

M.Sc.-Project Towards electron spin quantum bits in ZnSe

ZnSe exhibits ideal properties for hosting electron spin quantum bits. However, this II/VI semiconductor has not been considered for this purpose. In close collaboration with the group 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 using 1K electrical transport experiments.
Project description (PDF) Contact: Lars Schreiber

 

Additionally to the advertised projects, we are always very happy about unsolicited applications. Please contact the principal investigator who you want to work with to discuss possible projects.