Dynamical transport in graphene
Our team studies electronic dynamics in high mobility graphene / BN heterostructures using microwave transport and noise measurements. We are interested in the effects of interactions for Dirac fermions in the electronic optics and plasmonics regimes, as well as in the coupling of van der Waals insulators to light and phonon-polaritons. Beyond graphene, the approach is applied to hetero-structures of semiconductors and van der Waals topological insulators.
Electronic quantum optics
Our team studies two-dimensional layers of high mobility electrons (AsAlGa / AsGa). On the one hand, the dynamics of coherent conductors: what are the quantum Kirchhoff laws at high frequency? What is the relaxation time of a quantum coherent RC circuit? What is the elementary quantum inductance associated with a quantum mode? On the other hand, the manipulation of single electrons: in analogy with quantum optics, can we achieve a coherent single electron source, realize the entanglement of two electrons and exploit it in the form of flying qubits?
Hybrid quantum circuits
Our team uses microwave superconducting resonators to manipulate and probe quantum dots based on carbon nanotubes. This makes it possible to probe multi-body quantum phenomena such as the Kondo effect, the synthesis of new topological phases of matter, and finally the fabrication a spin qubits coupled to cavities.
Superconducting circuits and quantum information
Dynamical transport in topological insulators
Our team studies the dynamics of a new class of materials called topological insulators. These have the particularity of being insulating in their volume, but have so-called “topological” states at the interfaces, perfectly conductive and spin-polarized. By microwave techniques, we study the dynamical properties of these materials (electron speed, diffusivity, interactions), and develop innovative nanoelectronic devices such as frequency tunable spin sources based on these materials.