191 citations · 1.8k across the 31 of their papers we have counts for
26 papers · 1 filter
A new family of field-stable and highly sensitive SQUID current sensors based on sub-micrometer cross-type Josephson junctions
M. Schmelz, V. Zakosarenko, T. Schönau +5
We report on the development of a new family of SQUID current sensors based on sub-micron cross-type Josephson tunnel junctions. Their low total junction capacitance permit high us…
Nearly quantum limited nanoSQUIDs based on cross-type Nb/AlOx/Nb junctions
M. Schmelz, V. Zakosarenko, T. Schönau +4
We report on the development of nearly quantum limited SQUIDs with miniature pickup loop dimensions. The implemented high quality and low capacitance cross-type Nb/AlOx/Nb Josephso…
Investigation of all niobium Nano-SQUIDs based on sub-micrometer cross-type Josephson junctions
M. Schmelz, Y. Matsui, R. Stolz +6
We report on the development of highly sensitive SQUIDs featuring sub-micrometer loop dimensions. The integration of high quality and low capacitance SIS Nb/AlOx/Nb cross-type Jose…
Parametric amplification by coupled flux qubits
M. Rehak, P. Neilinger, M. Grajcar +4
We report the parametric amplification of a microwave signal in a Kerr medium formed from superconducting qubits. Two mutually coupled flux qubits, embedded in the current antinode…
Dressed-state amplification by a superconducting qubit
G. Oelsner, P. Macha, O. V. Astafiev +6
We demonstrate amplification of a microwave signal by a strongly driven two-level system in a coplanar waveguide resonator. The effect known from optics as dressed-state lasing is…
Losses in coplanar waveguide resonators at millikelvin temperatures
P. Macha, S. H. W. van der Ploeg, G. Oelsner +4
We study the loss rate for a set of lambda/2 coplanar waveguide resonators at millikelvin temperatures (20 mK - 900mK) and different applied powers (3E-19 W - 1E-12 W). The loss ra…