353 citations · 989 across the 32 of their papers we have counts for
8 papers · 1 filter
A superconductor free of quasiparticles for seconds
E. T. Mannila, P. Samuelsson, S. Simbierowicz +6
Superconducting devices, based on the Cooper pairing of electrons, play an important role in existing and emergent technologies, ranging from radiation detectors to quantum compute…
Flux-driven Josephson parametric amplifier for sub-GHz frequencies fabricated with side-wall passivated spacer junction technology
Slawomir Simbierowicz, Visa Vesterinen, Leif Grönberg +3
We present experimental results on a Josephson parametric amplifier tailored for readout of ultra-sensitive thermal microwave detectors. In particular, we discuss the impact of fab…
Side-wall spacer passivated sub-um Josephson junction fabrication process
Leif Grönberg, Mikko Kiviranta, Visa Vesterinen +5
We present a structure and a fabrication method for superconducting tunnel junctions down to the dimensions of 200 nm using i-line UV lithography. The key element is a side-wall-pa…
Verification of stable operation of rapid single flux quantum devices with selective dissipation
J. Hassel, L. Gronberg, P. Helisto
It has been suggested that Rapid Single Flux Quantum (RSFQ) devices could be used as the classical interface of superconducting qubit systems. One problem is that the interface act…
High resolution superconducting single flux quantum comparator for sub kelvin temperatures
A. M. Savin, J. P. Pekola, T. Holmqvist +4
A design of subkelvin single flux quantum (SFQ) circuits with reduced power dissipation and additional cooling of shunt resistors for superconducting qubit control circuits has bee…
Description of self-synchronization effects in distributed Josephson junction arrays using harmonic analysis and power balance
J. Hassel, L. Gronberg, P. Helisto +1
Power generation and synchronisation in Josephson junction arrays have attracted attention for a long time. This stems from fundamental interest in nonlinear coupled systems as wel…