243 citations · 2.8k across the 88 of their papers we have counts for
6 papers · 1 filter
Loss and decoherence due to stray infrared light in superconducting quantum circuits
R. Barends, J. Wenner, M. Lenander +14
We find that stray infrared light from the 4 K stage in a cryostat can cause significant loss in superconducting resonators and qubits. For devices shielded in only a metal box, we…
Reduced frequency noise in superconducting resonators
R. Barends, N. Vercruyssen, A. Endo +4
We report a reduction of the frequency noise in coplanar waveguide superconducting resonators. The reduction of 7 dB is achieved by removing the exposed dielectric substrate surfac…
Minimal resonator loss for circuit quantum electrodynamics
R. Barends, N. Vercruyssen, A. Endo +6
Single photon level quality factors of 500x10^3 are shown in NbTiN superconducting resonators at millikelvin temperatures. This result originates from the intrinsic low dielectric…
Contribution of dielectrics to frequency and noise of NbTiN superconducting resonators
R. Barends, H. L. Hortensius, T. Zijlstra +4
We study NbTiN resonators by measurements of the temperature dependent resonance frequency and frequency noise. Additionally, resonators are studied covered with SiOx dielectric la…
Electrical detection of spin accumulation and spin precession at room temperature in metallic spin valves
F. J. Jedema, M. V. Costache, H. B. Heersche +2
We have fabricated a multi terminal lateral mesoscopic metallic spin valve demonstrating spin precession at room temperature, using tunnel barriers in combination with metallic fer…
The controllable pi - SQUID
J. J. A. Baselmans, B. J. van Wees, T. M. Klapwijk
We have fabricated and studied a new kind of DC SQUID in which the magnitude and sign of the critical current of the individual Josephson junctions can be controlled by additional…