Master's Defense: Carlos Ortega Taberner
Title: Periodically driven S-QD-S junction
Abstract: Time-periodic drives are known to provide control over quantum devices. The aim of this thesis is to study the S-QD-S junction, a widely used device, and how periodical drives can be used to control its properties. In the first part of the thesis the Floquet-Green's function technique used to obtain exact numerical results and the Floquet formalism used to interpret them are described. In the second part the junction is studied under the application of either an ac magnetic field or an ac gate voltage on the dot. It is shown how, by tuning the parameters of the drive, one can control properties of the junction, such as the current-phase or the current-voltage relations.