Spectroscopy with Josephson Junctions
Date: Thursday, November 29th, 2018
Location: 100 Willamette Hall
Speaker: Çağlar Girit, Collège de France
Spectroscopy, by providing a direct measurement of the energy spectrum, is a powerful tool to probe matter. Conventional spectroscopy techniques suffer several drawbacks when applied to mesoscopic systems, or artificial quantum coherent atoms. I present an on-chip, Josephson-junction based spectrometer which surpasses state-of-the-art instruments, works between 2-200 GHz, and is ideally suited for probing elementary excitations in mesoscopic systems. I describe the operating principle and design of the spectrometer, show spectra of several superconducting quantum circuits, and outline experiments to investigate single quasiparticles in superconductors.
Host: Benjamín J. Alemán
All attendees are invited to attend a colloquium reception in the Willamette Hall, Paul Olum atrium at 3:40pm.