Publications (54)
Learning Lindblad Dynamics of a Superconducting Quantum Processor
Johann Bock Severin, Malthe A. Marciniak, Rune Thinggaard Birke +13
Accurate models of quantum processors are essential for understanding, calibrating, and improving their performance. In practice, model construction must balance physical detail ag…
Period multiplication in a parametrically driven superconducting resonator
Ida-Maria Svensson, Andreas Bengtsson, Jonas Bylander +2
We report on the experimental observation of period multiplication in parametrically driven tunable superconducting resonators. We modulate the magnetic flux through a superconduct…
Microwave photon generation in a doubly tunable superconducting resonator
Ida-Maria Svensson, Mathieu Pierre, Michaël Simoen +7
We have developed and tested a doubly tunable resonator, with the intention to simulate fast motion of the resonator boundaries in real space. Our device is a superconducting copla…
Time-Reversal Symmetry and Universal Conductance Fluctuations in a Driven Two-Level System
Simon Gustavsson, Jonas Bylander, William D. Oliver
In the presence of time-reversal symmetry, quantum interference gives strong corrections to the electric conductivity of disordered systems. The self-interference of an electron wa…
Signal crosstalk in a flip-chip quantum processor
Sandoko Kosen, Hang-Xi Li, Marcus Rommel +15
Quantum processors require a signal-delivery architecture with high addressability (low crosstalk) to ensure high performance already at the scale of dozens of qubits. Signal cross…
Simplified Josephson-junction fabrication process for reproducibly high-performance superconducting qubits
A. Osman, J. Simon, A. Bengtsson +6
We introduce a simplified fabrication technique for Josephson junctions and demonstrate superconducting Xmon qubits with relaxation times averaging above 50s (1.5$\t…