The results of low frequency conductance and radio-frequency reflectometry measurements are presented for single electron charge traps coupled to single-electron transistors (SETs). The presence of a charge trap leads to a characteristic distortion of the Coulomb charging diamonds, accurately simulated through an electrostatic model. Within the blockaded region of the SET the change of occupation of the particular trap is obscured in the low frequency measurement; however, it is clearly detected in the radio-frequency measurement, exactly where the model predicts.

In this talk I shall review the research activity of my group in the field of SiGe growth, characterisation, and device fabrication. I will present our main results on self-assembled islands, NIR-Photodetector,and Ge/SiGe multi-quantum well structures. A proposal for a Si based QCL will also be discussed.

Bio

Nitrogen-Vacancy (NV) centers are atomic-size defects in diamond, comprising a few iso-lated spins that can be manipulated and addressed on a single-site level. Due to their excep-tional coherence properties, fast controllability and the robust optical interface, they emerged as an important platform for studying spin-based quantum phenomena and basic quantum algorithms in the solid state.

Lieven will talk about the coherent control and entanglement of electron spins in coupled quantum dots, aimed at the realization of an elementary quantum computer.

The technology to implement ideas in quantum information science continues to improve, with advances in materials science, quantum control, and device construction leading to new paradigms for computation. In this talk I explore how several of these advances---cavity and circuit QED, two- and three-spin based quantum computation in semiconductor quantum dots, and nanomechanical resonators---lead to improved approaches to implementing ideas in both quantum information processing and in quantum-limited metrology.

We have investigated the wrapping of Poly(3-hexyl-thiophene) (P3HT) on carbon nanotubes for electronic and photovoltaic applications. By combining Scanning Tunnelling Microscopy (STM) and Spectroscopy (STS), and High Resolution Transmission Electron Microscopy (HR-TEM) it has been possible to investigate at atomic resolution the adhesion and the self organisation of the polymer on the nanotube surface.