Loss and decoherence due to stray infrared light in superconducting quantum circuits

Details Loss and decoherence due to stray infrared light in superconducting quantum circuits Loss and decoherence due to stray infrared light in superconducting quantum circuits

2011-05-23

arxiv.org/abs/1105.4642v1

Appl. Phys. Lett. 99, 113507 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

10.1063/1.3638063

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 measured resonators with quality factors Q = 10^5 and qubits with energy relaxation times T_1=120 ns, consistent with a stray light-induced quasiparticle density of 170-230 \mu m^{-3}. By adding a second black shield at the sample temperature, we found about an order of magnitude improvement in performance and no sensitivity to the 4 K radiation. We also tested various shielding methods, implying a lower limit of Q = 10^8 due to stray light in the light-tight configuration.

Affiliated with

Also associated with

No associations

Rating

Loss and decoherence due to stray infrared light in superconducting quantum circuits does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Loss and decoherence due to stray infrared light in superconducting quantum circuits, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Loss and decoherence due to stray infrared light in superconducting quantum circuits will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-514497