Reaching the ultimate energy resolution of a quantum detector

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Tutkijat

Organisaatiot

  • Lund University

Kuvaus

Quantum calorimetry, the thermal measurement of quanta, is a method of choice for ultrasensitive radiation detection ranging from microwaves to gamma rays. The fundamental temperature fluctuations of the calorimeter, dictated by the coupling of it to the heat bath, set the ultimate lower bound of its energy resolution. Here we reach this limit of fundamental equilibrium fluctuations of temperature in a nanoscale electron calorimeter, exchanging energy with the phonon bath at very low temperatures. The approach allows noninvasive measurement of energy transport in superconducting quantum circuits in the microwave regime with high efficiency, opening the way, for instance, to observe quantum jumps, detecting their energy to tackle central questions in quantum thermodynamics.

Yksityiskohdat

AlkuperäiskieliEnglanti
Artikkeli367
Sivut1-6
Sivumäärä6
JulkaisuNature Communications
Vuosikerta11
Numero1
TilaJulkaistu - 1 joulukuuta 2020
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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