Advanced Technologies for Superconducting Qubits: Josephson Junctions

What it is about

You work in a two-week laboratory block on advanced techniques for the fabrication and characterization of components for superconducting qubits, with a focus on Josephson contacts. In the end you will be able to microfabricate such circuit components, measure morphologically and electrically, and analyze and present the resulting measurement data.

What you will be able to do

• Describe the structure and operating principles of the basic building blocks of superconducting qubit technologies (in particular Josephson contacts)
• Understand fabrication and performance challenges of Josephson contacts
• Fabricate Josephson contacts using thin-film deposition, micromachining and etching
• Characterize the morphology and structure of the components (e.g. AFM, profilometry, optical microscopy)
• Explain methods of electrical characterization of Josephson contacts and their materials
• Analyze and model DC measurement data
• Present results in written and oral form clearly

What the module consists of

• LaborpraktikumCore activity: practical application of fabrication and measurement methods under supervision
• Einführende PräsentationenConveying of theoretical background, safety and experimental procedure
• Diskussionen und LiteraturarbeitDeepening of theory and current scientific/technological challenges
• Datenanalyse und BerichtEvaluation of measurement data and preparation of the lab report
• AbschlusspräsentationPresentation and discussion of the results

Teaching method

• Einführungs‑Vorträge durch Labortutor:innenConveying of theory, safety and experimental planning
• Informelle DiskussionenClarification of questions and ongoing reflection during the course
• Selbststudium (Lehrbuch/Literatur)Deepening of the theoretical background
• Hands‑on Laborarbeit unter BetreuungLearning and practicing practical skills on equipment and processes
• Datenanalyse mit Software (Origin, Matlab) oder eigenen ProgrammenEvaluation and interpretation of the measurement results
• Schreiben eines LaborberichtsTraining in scientific documentation
• Mündliche AbschlusspräsentationTraining of oral science communication