Kraglund Andersen, Christian

Date: Monday, February 15, 2016
Time: 11:00
Place: ETH Zurich, Hönggerberg, HPF G 6
Host: Andreas Wallraff

Arrays of Josephson junctions: A useful tool for quantum optics

Christian Kraglund Andersen
Aarhus University, Denmark

Superconducting resonators and qubits have within the last two decades progressed from a neat idea to a platform where novel concepts from quantum optics, information and computing are rutinely implemented. In this talk I will review a useful tool for these implementations, namely an array of Josphson junctions. I will show how the non-linearity of such an array gives rise to interesting quantum effects when probing the system, how the dynamical properties of an array can be used in a new quantum feedback concept and, finally, how the large zero-point fluctuation of the field in an array can be used to reach the ultrastrong coupling regime of circuit QED.