Narrow-Band Microwave Radiation from a Biased Single-Cooper-Pair Transistor
- 29 May 2007
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 98 (22), 227001
- https://doi.org/10.1103/physrevlett.98.227001
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.Keywords
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