Fluctuations in the electron system of a superconductor exposed to a photon flux
Fluctuations in the electron system of a superconductor exposed to a photon flux
In a superconductor, in which electrons are paired, the density of unpaired electrons should become zero when approaching zero temperature. Therefore, radiation detectors based on breaking of pairs promise supreme sensitivity, which we demonstrate using an aluminium superconducting microwave resonator. Here we show that the resonator also enables the study …