94 citations · 372 across the 10 of their papers we have counts for
10 papers
Quantum behavior of a superconducting Duffing oscillator at the dissipative phase transition
Qi-Ming Chen, Michael Fischer, Yuki Nojiri +8
Understanding the non-deterministic behavior of deterministic nonlinear systems has been an implicit dream since Lorenz named it the "butterfly effect". A prominent example is the…
In-situ tunable nonlinearity and competing signal paths in coupled superconducting resonators
Michael Fischer, Qi-Ming Chen, Christian Besson +10
We have fabricated and studied a system of two tunable and coupled nonlinear superconducting resonators. The nonlinearity is introduced by galvanically coupled dc-SQUIDs. We simula…
Secure quantum remote state preparation of squeezed microwave states
S. Pogorzalek, K. G. Fedorov, M. Xu +10
Quantum communication protocols based on nonclassical correlations can be more efficient than known classical methods and offer intrinsic security over direct state transfer. In pa…
Compact 3D quantum memory
Edwar Xie, Frank Deppe, Michael Renger +8
Superconducting 3D microwave cavities offer state-of-the-art coherence times and a well controlled environment for superconducting qubits. In order to realize at the same time fast…
Parity-Engineered Light-Matter Interaction
Jan Goetz, Frank Deppe, Kirill G. Fedorov +6
The concept of parity describes the inversion symmetry of a system and is of fundamental relevance in the standard model, quantum information processing, and field theory. In quant…
Flux-driven Josephson parametric amplifiers: Hysteretic flux response and nondegenerate gain measurements
Stefan Pogorzalek, Kirill G. Fedorov, Ling Zhong +11
Josephson parametric amplifiers (JPA) have become key devices in quantum science and technology with superconducting circuits. In particular, they can be utilized as quantum-limite…
Second-order decoherence mechanisms of a transmon qubit probed with thermal microwave states
J. Goetz, F. Deppe, P. Eder +9
Thermal microwave states are omnipresent noise sources in superconducting quantum circuits covering all relevant frequency regimes. We use them as a probe to identify three second-…
Displacement of propagating squeezed microwave states
Kirill G. Fedorov, L. Zhong, S. Pogorzalek +16
Displacement of propagating quantum states of light is a fundamental operation for quantum communication. It enables fundamental studies on macroscopic quantum coherence and plays…
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…