5 papers · 1 filter
Readout failures in superconducting qubits due to TLS-defects in tunnel junctions
J. Lisenfeld, A. K. Händel, A. Bilmes +1
Material defects give rise to parasitic two-level systems (TLS) which present a major source of decoherence in superconducting qubits. Here, we study a strongly coupled TLS that re…
Benchmarking the quality of multiplexed qubit readout beyond assignment fidelity
Andras Di Giovanni, Adrian Skasberg Aasen, Jürgen Lisenfeld +3
The accurate measurement of quantum two-level objects (qubits) is crucial for developing quantum computers. Over the last decade, the measure of choice for benchmarking readout rou…
Gradiometric, Fully Tunable C-Shunted Flux Qubits
Benedikt Berlitz, Alexander Konstantin Händel, Etienne Daum +2
Fully tunable flux qubits offer in-situ and independent controls of their energy potential asymmetry and tunnel barrier, making them versatile tools for quantum computation and the…
Mitigation of correlated readout errors without randomized measurements
Adrian Skasberg Aasen, Andras Di Giovanni, Hannes Rotzinger +2
Quantum simulation, the study of strongly correlated quantum matter using synthetic quantum systems, has been the most successful application of quantum computers to date. It often…
Readout error mitigated quantum state tomography tested on superconducting qubits
Adrian Skasberg Aasen, Andras Di Giovanni, Hannes Rotzinger +2
Quantum technologies rely heavily on accurate control and reliable readout of quantum systems. Current experiments are limited by numerous sources of noise that can only be partial…