Please find below an announcement from Physics department about an upcoming seminar of interest.
In contrast to solid state physics, there is a common regime in quantum transport where electron-electron interaction effects are dominant: the Coulomb blockade regime. In the context of nanostructure Quantum dots (such as carbon nanotube, semiconductor heterostructures), the discreteness of electron spectrum becomes important together with Coulomb interaction. A measuring device composed of two electrodes and the bridging dot allows us to probe these quantum properties (energy levels, orbitals) of a molecule directly. Here, carbon nanotubes (CNTs) are very interesting active elements, where the observed electron transport crucially depends on the intensity of coupling to the electrodes. Moreover, the possibility of combining different electronic orders (ferromagnets,superconductors etc.) or dimensionalities (3D electrodes, nanoparticles,Fullerenes, molecular magnets etc.) makes these electronic circuits more fascinating.
In this presentation, I will discuss low temperature electrical transport properties of carbon nanotube QD circuits, which are coupled to magnetic objects in two different ways.
The last part of the presentation concerns the recent development of ”Circuit quantum electrodynamics” architecture which brought the realization to combine QD circuits with microwave cavities. We couple a CNT quantum dot in the Coulomb blockade or in the Kondo regime to a single mode of the electromagnetic field and take a step further towards circuit QED experiments.
S. Datta, L. Marty, J. P. Cleuziou, C. Tilmaciu, B. Soula, E. Flahaut, W. Wernsdorfer, Phys. Rev. Lett. (2011).