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Loss mechanisms in superconducting thin film microwave resonators
Jan Goetz, Frank Deppe, Max Haeberlein +10
We present a systematic analysis of the internal losses of superconducting coplanar waveguide microwave resonators based on niobium thin films on silicon substrates. In particular,…
Tunable coupling of transmission-line microwave resonators mediated by an rf SQUID
F. Wulschner, J. Goetz, F. R. Koessel +18
We realize tunable coupling between two superconducting transmission line resonators. The coupling is mediated by a non-hysteretic rf SQUID acting as a flux-tunable mutual inductan…
A Superconducting 180° Hybrid Ring Coupler for circuit Quantum Electrodynamics
E. Hoffmann, F. Deppe, T. Niemczyk +11
Superconducting circuit quantum electrodynamics experiments with propagating microwaves require devices acting as beam splitters. Using niobium thin films on silicon and sapphire s…
Two-resonator circuit QED: Dissipative Theory
Georg M. Reuther, David Zueco, Frank Deppe +9
We present a theoretical treatment for the dissipative two-resonator circuit quantum electrodynamics setup referred to as quantum switch. There, switchable coupling between two sup…
Fabrication Technology of and Symmetry Breaking in Superconducting Quantum Circuits
T. Niemczyk, F. Deppe, M. Mariantoni +6
Superconducting quantum circuits are promising systems for experiments testing fundamental quantum mechanics on a macroscopic scale and for applications in quantum information proc…
Two-photon probe of the Jaynes-Cummings model and symmetry breaking in circuit QED
Frank Deppe, Matteo Mariantoni, E. P. Menzel +9
Superconducting qubits behave as artificial two-level atoms and are used to investigate fundamental quantum phenomena. In this context, the study of multi-photon excitations occupi…