AMADEus Seminar - Prof. Alexey Ustinov, Friday 19 October 2012 - 10:00 am, Amphi 3 - ENSCBP
Karlsruhe Institute of Technology (KIT), D-76131 Karlsruhe, Germany
National University of Science and Technology MISIS, Moscow 119049, Russia
Superconductors can be used for designing metamaterials with extremely low losses, well-controlled nonlinearity, and frequency tunability. Moreover, superconducting metamaterials offer an intriguing and unique possibility of exploring the quantum effects using Josephson quantum circuits. The design flexibility of superconducting thin-film circuits allows for utilizing small sizes down to the nanoscale while maintaining low loss properties. Superconducting metamaterials can be composed of frequency-tunable resonators and Josephson junctions that are characterized by low dissipation and tunability at microwave and millimeter wave frequencies. In the talk, I will present experiments made to date and discuss possible realization of quantum metamaterials based on arrays of superconducting qubits which can be viewed as artificial two-level atoms.