Quantum Engineering and Transport
The focus of our research is the description of the electrical transport properties of nanoscale systems. These properties are influenced by quantum mechanical coherence, dissipation, and interaction among the charge carriers. We develop methods to describe the large variety of nanoscale systems, but also work on the description of new measurable observables like current noise and counting statistics that provide a deeper understanding of the relevant transport processes.
We present a quantum master equation analysis of the dynamics of magnetic adatoms on a metallic surface probed by a spin polarized STM. As a specific example, we investigate the behaviour and exceptional long lifetimes of single holmium atoms on platinum.Phys. Rev. B 91, 245430 (2015)
We present a low-temperature experimental test of the fluctuation theorem for electron transport through a double quantum dot. The rare entropy-consuming system trajectories where single charges flow against the source-drain bias appear with a frequency that agrees with the theoretical predictions.Phys. Rev. X 2, 011001 (2012)