Fluctuations in the electron system of a superconductor exposed to a photon flux

Abstract

We report on fluctuations in the electron system, Cooper pairs and quasiparticles, of a superconducting aluminium film. The superconductor is exposed to pair-breaking photons (1.54 THz), which are coupled through an antenna. The change in the complex conductivity of the superconductor upon a change in the quasiparticle number is read out by a microwave resonator. A large range in radiation power can be chosen by carefully filtering the radiation from a blackbody source. We identify two regimes. At high radiation power, fluctuations in the electron system caused by the random arrival rate of the photons are resolved, giving a straightforward measure of the optical efficiency (48%). At low radiation power fluctuations are dominated by excess quasiparticles, the number of which is measured through their recombination lifetime.

References in corpus (10)

• Number fluctuations of sparse quasiparticles in a superconductor
• Quasiparticle relaxation of superconducting qubits in the presence of flux
• A semi-empirical model for two-level system noise in superconducting microresonators
• Minimal resonator loss for circuit quantum electrodynamics
• Evidence of a nonequilibrium distribution of quasiparticles in the microwave response of a superconducting aluminium resonator
• Contribution of dielectrics to frequency and noise of NbTiN superconducting resonators
• Energy decay and frequency shift of a superconducting qubit from non-equilibrium quasiparticles
• Enhancement of quasiparticle recombination in Ta and Al superconductors by implantation of magnetic and nonmagnetic atoms
• Microwave-induced excess quasiparticles in superconducting resonators measured through correlated conductivity fluctuations
• Reduced frequency noise in superconducting resonators

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