Fast Electron Thermometry for Ultrasensitive Calorimetric Detection

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2015
Major/Subject
Mcode
Degree programme
Language
en
Pages
1-7
Series
PHYSICAL REVIEW APPLIED, Volume 3, issue 1
Abstract
We demonstrate radio-frequency thermometry on a micrometer-sized metallic island below 100 mK. Our device is based on a normal-metal–insulator–superconductor tunnel junction coupled to a resonator with transmission readout. In the first generation of the device, we achieve 90  μK/√Hz noise-equivalent temperature with 10 MHz bandwidth. We measure the thermal relaxation time of the electron gas in the island, which we find to be of the order of 100  μs. Such a calorimetric detector, upon optimization, can be seamlessly integrated into superconducting circuits, with immediate applications in quantum-thermodynamics experiments down to single quanta of energy.
Description
VK: Low Temperature Laboratory
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Citation
Gasparinetti , S , Viisanen , K , Saira , O-P , Faivre , T , Arzeo , M , Meschke , M & Pekola , J P 2015 , ' Fast Electron Thermometry for Ultrasensitive Calorimetric Detection ' , Physical Review Applied , vol. 3 , no. 1 , 014007 , pp. 1-7 . https://doi.org/10.1103/PhysRevApplied.3.014007