Coupled flux qubits
Superconducting Quantum Circuits
faculty / division:
PHI / IQMT
Dr. Hannes Rotzinger, Dr. Jürgen Lisenfeld
In the framework of the national GeQCOS project (1), we will develop a superconducting quantum processor demonstrator based on flux qubits. The qubits will consist of a nanoscale Josephson junction and a comparably large shunt inductance (a so-called "gFlux-qubit" (2)) and other superconducting thin film circuit elements. In comparison to state-of-the art processors using Transmon qubits, flux qubits offer the benefits of substantially larger anharmonicity and thus better scalability, allowing for more complex quantum circuits. In this thesis we will focus on the study of different coupling mechanisms between two qubits, for an overview see e.g. (3).
Your work will be to design and fabricate the qubits at the local cleanroom facilities, and later analyse them in our low temperature cryostats. You will learn state-of-the art thin film nanofabrication technology as well as measurement skills at cryogenic temperatures.
We are happy to talk to you if you have interest in solid state physics, quantum information processing and nanotechnology, or, of course, any other related question.
(2) https://arxiv.org/pdf/2006.04130.pdf, https://www.nature.com/articles/ncomms12964