214 citations · 670 across the 13 of their papers we have counts for
13 papers
Quantum emulation of the transient dynamics in the multistate Landau-Zener model
Alexander Stehli, Jan David Brehm, Tim Wolz +4
Quantum simulation is one of the most promising near term applications of quantum computing. Especially, systems with a large Hilbert space are hard to solve for classical computer…
Fluxons in high-impedance long Josephson junctions
Micha Wildermuth, Lukas Powalla, Jan Nicolas Voss +5
The dynamics of fluxons in long Josephson junctions is a well-known example of soliton physics and allows for studying highly nonlinear relativistic electrodynamics on a microscopi…
Frequency fluctuations of ferromagnetic resonances at milliKelvin temperatures
Tim Wolz, Luke McLellan, Alexander Stehli +5
Unwanted fluctuations over time, in short, noise, are detrimental to device performance, especially for quantum coherent circuits. Recent efforts have demonstrated routes to utiliz…
Amplitude and frequency sensing of microwave fields with a superconducting transmon qudit
Maximilian Kristen, Andre Schneider, Alexander Stehli +9
Experiments with superconducting circuits require careful calibration of the applied pulses and fields over a large frequency range. This remains an ongoing challenge as commercial…
Introducing coherent time control to cavity-magnon-polariton modes
Tim Wolz, Alexander Stehli, Andre Schneider +5
By connecting light to magnetism, cavity-magnon-polaritons (CMPs) can build links from quantum computation to spintronics. As a consequence, CMP-based information processing device…
Rabi oscillations in a superconducting nanowire circuit
Yannick Schön, Jan Nicolas Voss, Micha Wildermuth +6
We investigate the circuit quantum electrodynamics of anharmonic superconducting nanowire oscillators. The sample circuit consists of a capacitively shunted nanowire with a width o…
Transmon Qubit in a Magnetic Field: Evolution of Coherence and Transition Frequency
Andre Schneider, Tim Wolz, Marco Pfirrmann +4
We report on spectroscopic and time-domain measurements on a fixed-frequency concentric transmon qubit in an applied in-plane magnetic field to explore its limits of magnetic field…
Magnons at low excitations: Observation of incoherent coupling to a bath of two-level-systems
Marco Pfirrmann, Isabella Boventer, Andre Schneider +4
Collective magnetic excitation modes, magnons, can be coherently coupled to microwave photons in the single excitation limit. This allows for access to quantum properties of magnon…
Correlating decoherence in transmon qubits: Low frequency noise by single fluctuators
Steffen Schlör, Jürgen Lisenfeld, Clemens Müller +5
We report on long-term measurements of a highly coherent, non-tunable superconducting transmon qubit, revealing low-frequency burst noise in coherence times and qubit transition fr…
Local Sensing with the Multi-Level AC Stark Effect
Andre Schneider, Jochen Braumüller, Lingzhen Guo +5
Analyzing weak microwave signals in the GHz regime is a challenging task if the signal level is very low and the photon energy widely undefined. A superconducting qubit can detect…
Analog quantum simulation of the Rabi model in the ultra-strong coupling regime
Jochen Braumüller, Michael Marthaler, Andre Schneider +4
The quantum Rabi model describes the fundamental mechanism of light-matter interaction. It consists of a two-level atom or qubit coupled to a quantized harmonic mode via a transver…
Concentric transmon qubit featuring fast tunability and an anisotropic magnetic dipole moment
Jochen Braumüller, Martin Sandberg, Michael R. Vissers +10
We present a planar qubit design based on a superconducting circuit that we call concentric transmon. While employing a straightforward fabrication process using Al evaporation and…
Metamaterials proposed as perfect magnetoelectrics
A. M. Shuvaev, S. Engelbrecht, M. Wunderlich +2
Magnetoelectric susceptibility of a metamaterial built from split ring resonators have been investigated both experimentally and within an equivalent circuit model. The absolute va…