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Narrow-Band Microwave Radiation from a Biased Single-Cooper-Pair Transistor

O. Naaman, J. Aumentado

DOI 10.1103/PhysRevLett.98.227001 · Physical Review Letters

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Abstract

We show that a single-Cooper-pair transistor (SCPT) electrometer emits narrow-band microwave radiation when biased in its subgap region. Photoexcitation 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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FormulaReported Tc (K)Pressure (GPa)Type
Al

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