13 papers · 1 filter
In situ calibration of microwave attenuation and gain using a cryogenic on-chip attenuator
Thomas Descamps, Linus Andersson, Vittorio Buccheri +3
Accurate in situ calibration of microwave attenuation and amplification-chain noise is essential for superconducting quantum circuits. We demonstrate a compact, self-calibrating cr…
Real-time detection of correlated quasiparticle tunneling events in a multi-qubit superconducting device
Simon Sundelin, Linus Andersson, Hampus Brunander +1
Quasiparticle tunneling events are a source of decoherence and correlated errors in superconducting circuits. Understanding and ultimately mitigating these errors calls for real-ti…
Overhead in Quantum Circuits with Time-Multiplexed Qubit Control
Marvin Richter, Ingrid Strandberg, Simone Gasparinetti +1
When scaling up quantum processors in a cryogenic environment, it is desirable to limit the number of qubit drive lines going into the cryostat, since fewer lines makes cooling of…
Effective Hamiltonian for an off-resonantly driven qubit-cavity system
Martin Jirlow, Kunal Helambe, Axel M. Eriksson +2
Accurate modeling of driven light-matter interactions is essential for quantum technologies, where natural and synthetic atoms are used to store and process quantum information, me…
Automated, physics-guided, multi-parameter design optimization for superconducting quantum devices
Axel M. Eriksson, Lukas J. Splitthoff, Harsh Vardhan Upadhyay +5
The design of nonlinear superconducting quantum circuits often relies on time-consuming iterative electromagnetic simulations requiring manual intervention. These interventions ent…
Co-designed reflective and leaky-waveguide low-pass filter for superconducting circuits
Linus Andersson, Benjamin Olsson, Simone Gasparinetti +1
A stepped-impedance low-pass filter with integrated hollow waveguide absorbers is presented. The filter combines low insertion loss in the passband with strong attenuation at high…