Narrow band microwave radiation from a biased single-Cooper-pair transistor

Details Narrow band microwave radiation from a biased single-Cooper-pair transistor Narrow band microwave radiation from a biased single-Cooper-pair transistor

2006-09-19

arxiv.org/abs/cond-mat/0609491v2

Phys. Rev. Lett. 98, 227001 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.98.227001

We show that a single-Cooper-pair transistor (SCPT) electrometer emits narrow-band microwave radiation when biased in its sub-gap region. Photo activation of quasiparticle tunneling in a nearby SCPT is used to spectroscopically detect this radiation, in a configuration that closely mimics a qubit-electrometer integrated circuit. We identify emission lines due to Josephson radiation and radiative transport processes in the electrometer, and argue that a dissipative superconducting electrometer can severely disrupt the system it attempts to measure.

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