Fast Electron Thermometry for Ultrasensitive Calorimetric Detection

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Volume Title

A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

Date

2015

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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.

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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