Projects per year
Abstract
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.
Original language | English |
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Article number | 367 |
Pages (from-to) | 1-6 |
Number of pages | 6 |
Journal | Nature Communications |
Volume | 11 |
Issue number | 1 |
DOIs | |
Publication status | Published - 1 Dec 2020 |
MoE publication type | A1 Journal article-refereed |
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QTF: Finnish Centre of Excellence in Quantum Technology
Pekola, J., Blanchet, F., Golubev, D., Maillet, O., Marín Suárez, M., Mannila, E. & Senior, J.
01/01/2018 → 31/12/2020
Project: Academy of Finland: Other research funding
Equipment
Press/Media
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How Sensitive Can Your Quantum Detector Be?
23/01/2020
1 item of Media coverage
Press/Media: Media appearance
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How sensitive can a quantum detector be? ...
20/01/2020
1 item of Media coverage
Press/Media: Media appearance
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Kvantti-ilmaisin mittaa minimaaliset energiamuutokset
18/01/2020
1 item of Media coverage
Press/Media: Media appearance