Noise and loss of superconducting aluminium resonators at single photon energies

TL;DR

This paper investigates the loss and noise characteristics of aluminium superconducting resonators at the single photon energy level, providing insights into decoherence mechanisms relevant for quantum circuits.

Contribution

It presents the first measurement of noise in superconducting aluminium resonators at the single photon limit, expanding understanding of decoherence sources.

Findings

Noise in superconducting resonators is significant at single photon energies

Loss mechanisms are characterized in aluminium resonators at low energies

Results inform improvements in quantum circuit coherence

Abstract

The loss and noise mechanisms of superconducting resonators are useful tools for understanding decoherence in superconducting circuits. While the loss mechanisms have been heavily studied, noise in superconducting resonators has only recently been investigated. In particular, there is an absence of literature on noise in the single photon limit. Here, we measure the loss and noise of an aluminium on silicon quarter-wavelength ($\lambda/4$) resonator in the single photon regime.