| Autor: |
Mannila ET; QTF Centre of Excellence, Department of Applied Physics, Aalto University, FI-00076 Aalto, Finland., Maisi VF; Physics Department and NanoLund, Lund University, Box 118, 22100 Lund, Sweden., Pekola JP; QTF Centre of Excellence, Department of Applied Physics, Aalto University, FI-00076 Aalto, Finland. |
| Jazyk: |
angličtina |
| Zdroj: |
Physical review letters [Phys Rev Lett] 2021 Oct 01; Vol. 127 (14), pp. 147001. |
| DOI: |
10.1103/PhysRevLett.127.147001 |
| Abstrakt: |
We propose and experimentally demonstrate a self-calibrating detector of Cooper pair depairing in a superconductor based on a mesoscopic superconducting island coupled to normal metal leads. On average, exactly one electron passes through the device per broken Cooper pair, independent of the absorber volume, device, or material parameters. The device operation is explained by a simple analytical model and verified with numerical simulations in quantitative agreement with experiment. In a proof-of-concept experiment, we use such a detector to measure the high-frequency phonons generated by another, electrically decoupled superconducting island, with a measurable signal resulting from less than 10 fW of dissipated power. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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