Transmon and superconducting qubits (C05)

• Subject Area: Theoretical Condensed Matter Physics
• Term: since 2020
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 277101999

Coupled superconducting circuits have emerged as one of the leading platforms in quantum information science. Their hallmark, the nonlinearity of Josephson junctions, enables the definition of the qubit subspace in the first place but may also give rise to many-body quantum chaos. We will carry our investigation of spectral instabilities caused by the nonlinearities over to flux and fluxonium qubits. We will seek ways to detect and mitigate dynamical instabilities during gate operations but also explore nonlinearities as a resource for error protection.

• DFG Programme: CRC/Transregios
• Subproject of: TRR 183: Entangled States of Matter
• International Connection: Denmark
• Applicant Institution: Universität zu Köln
• Project Heads: Professor Dr. Alexander Altland; Professor Karsten Flensberg; Professorin Dr. Christiane Koch; Professorin Dr. Anja Metelmann, until 6/2024; Professor Dr. Simon Trebst