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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…
Planck Spectroscopy and the Quantum Noise of Microwave Beam Splitters
M. Mariantoni, E. P. Menzel, F. Deppe +7
We use a correlation function analysis of the field quadratures to characterize both the black body radiation emitted by a 50 Ohm load resistor and the quantum properties of two ty…
Beyond the Jaynes-Cummings model: circuit QED in the ultrastrong coupling regime
T. Niemczyk, F. Deppe, H. Huebl +9
In cavity quantum electrodynamics (QED), light-matter interaction is probed at its most fundamental level, where individual atoms are coupled to single photons stored in three-dime…
Novel Multifunctional Materials Based on Oxide Thin Films and Artificial Heteroepitaxial Multilayers
Matthias Opel, Stephan Gepraegs, Edwin P. Menzel +14
Transition metal oxides show fascinating physical properties such as high temperature superconductivity, ferro- and antiferromagnetism, ferroelectricity or even multiferroicity. Th…
Dual-path state reconstruction scheme for propagating quantum microwaves and detector noise tomography
E. P. Menzel, F. Deppe, M. Mariantoni +7
Quantum state reconstruction involves measurement devices that are usually described by idealized models, but not known in full detail in experiments. For weak propagating microwav…