Property Rights of Personal Data and the Future of the Welfare State
Freitag, 21. Juli 2017
10.00 – 11.30 Uhr
SFB 767 / G. Rastelli, 3802
Dr. Ioan Pop, Karlsruhe Institute of Technology
Granular Aluminum (GrAl) is a self assembled material, easily obtained by standard aluminum deposition under oxygen atmosphere. Its properties have been studied extensively since the 60's, in particular motivated by the measurement of the superconductor-to-insulator transition, and the increase of the superconducting gap with increasing granularity. Recently, the material has been used for gap engineering in superconducting quantum bits  and for high kinetic inductance resonators . In this talk I will focus on the the nonlinear properties of GrAl. I will present a circuit quantum electrodynamics (cQED) model to calculate the Kerr coefficients of GrAl microwave resonators, starting from their nano-structure, and I will show measurements which support the cQED model. I will argue that GrAl is a promising material for non-linear quantum optics in the microwave domain.
 L. Sun et al. PRL (2012)
 H. Rotzinger et al. Supercond. Sci & Tech. (2016)