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

O. Naaman·J. Aumentado
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Abstract

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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O. Naaman, J. Aumentado. 2007-06-05. Narrow band microwave radiation from a biased single-Cooper-pair transistor. https://doi.org/10.1103/physrevlett.98.227001

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