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



Ofer Naaman, Joe Aumentado


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\textendash electrometer integrated circuit. We identify emission lines due to Josephson radiation and radiative transport processes in the electrometer, and show that dissipative electrometry can severely disrupt the system it attempts to measure.
Physical Review Letters


Josephson effect, quasiparticles, single Cooper pair transistor, tunneling


Naaman, O. and Aumentado, J. (2007), Narrow band microwave radiation from a biased single-Cooper-pair transistor, Physical Review Letters, [online], (Accessed May 20, 2024)


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Created May 28, 2007, Updated October 12, 2021