Flux Quantum Lab
Responsable : Çağlar GIRIT
Jeunes Equipes de l'Institut de Physique du Collège de France
The field of our research is superconducting mesoscopic physics. Josephson junction tools are being developed to probe condensed matter systems. We develop a very sensitive “on-chip” spectrometer wich allows to probe the energy levels of mesoscopic systems in the 1-1000 GHz energy range. This tool is quantum in the sense that the absorption of a photon emitted by the spectrometer causes the passage of a discrete charge (2e) to the detector. We use this spectrometer to determine the spectrum of diverse systems such as superconducting nanowires epitaxies, weak multi-terminal links, and topological quantum circuits. A second project is the development of a perfect voltage source (fluctuations less than 1 pV) adjustable in the range of 10-200 microvolt. This source, adapted from existing Josephson voltage standards, will allow not only to improve the performence of our spectrometer, but could be used for superconducting quantum information domains.
LIST OF THE PERMANENT MEMBRES OF THE TEAM
Çağlar Girit
Jean Loup Smirr