Experimentelle Arbeiten

  Scaning electron micrograph of a single electron transistor Urheberrecht: © Marcogliese

M.Sc. Project High-yield single-electron transistors for Spin Qubit Shuttle devices

In this project, you will design, fabricate and characterize single-electron transistors (SETs) in double quantum dot devices. The objective is to improve the yield of working charge sensors for Spin Qubit Shuttles by optimizing the design such that it is robust again fabrication errors and process drifts. Devices will be pre-characterized at 4K to obtain statistics on sensor reliability before measuring the performance of the most promising SETs in a dilution refrigerator.

Projektbeschreibung (PDF)

  Scanning electron micrograph of a shuttle device Urheberrecht: © R. Xue

B.Sc. Project Simulation-aided design of advanced spin qubit devices in Si/SiGe

In this project, you will use finite-element modelling to explore efficient methods for inducing shear strain in planar Si/SiGe spin qubit devices. This would allow one to enhance the energy splitting between the two low-lying valley states in silicon which represents a major challenge in the research community. You will also obtain the opportunity to pre-characterize novel spin qubit devices at 4K.

Projektbeschreibung (PDF)

  Charakterisierung von Spin-Qubit-Bauelementen mit hohem durchsatz Urheberrecht: © Struck/J-S Tu

M.Sc. Project Cryomultiplexing for enhanced characterization efficiency in spin-based quantum devices

In this project, you will innovate in cryomultiplexing for enhancing quantum computing device characterization. Key tasks involve designing and simulating PCBs and circuits for ultra-low temperature environments (4K to millikelvin), crucial for evaluating quantum devices efficiently. This work aims to significantly reduce the complexity and line count in pre-characterization setups, advancing the scalability of quantum computing technologies.

Projektbeschreibung (PDF)

  GaAs hetersostructure with gate-defined and optically active quantum dots Urheberrecht: © Kindel

M.Sc. Project Development of a photo-non-responsive 2DEG for a spin qubit to photon interface

In this project, you will design and fabricate novel GaAs heterostructures hosting a photo-non-responsive 2DEG for a spin qubit to photon interface. You will learn about state-of-the-art semiconductor fabrication in the clean room facilities of FZ Jülich and characterize samples with ultra-low temperature electrical and optical measurements of quantum effects.

Projektbeschreibung (PDF)

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

M.Sc.-Arbeit 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.
Projektbeschreibung (PDF)

  Optical cavity Urheberrecht: © 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)

  Schema eines Doppelquantenpunktes in ZnSe Urheberrecht: © Schreiber

M.Sc. Arbeit: Entwicklung von Elektron-Spinqubits in ZnSe mit Schattenmaskentechnologie

ZnSe hat ideale Eigenschaften in Hinblick auf Quantumcomputer mit Elektronenspins als Qubits. Bisher jedoch wurde es für diesen Zweck noch nicht näher untersucht. Unter Anleitung von Alex Pawlis (FZ Jülich), der Experte im Wachstum von (Zn,Mg)Se Schichten ist, werden Sie (Zn,Mg)Se Heterostrukturen charakerisieren und Quanten-Bauelemente fabrizieren.

Projektbeschreibung (PDF)



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