Fast Electron Thermometry for Ultrasensitive Calorimetric Detection

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

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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.

Yksityiskohdat

AlkuperäiskieliEnglanti
Artikkeli014007
Sivut1-7
JulkaisuPhysical Review Applied
Vuosikerta3
Numero1
TilaJulkaistu - 2015
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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