Regensburg 2019 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 29: Nanotubes and Nanoribbons

TT 29.1: Hauptvortrag

Dienstag, 2. April 2019, 14:00–14:30, H2

Mesoscopic quantum electrodynamics with carbon nanotubes — •Takis Kontos — CNRS/ENS, Paris, France

Cavity quantum electrodynamics techniques have turned out to be instrumental to probe or manipulate the electronic states of nanoscale circuits. Recently, cavity QED architectures have been extended to quantum dot circuits. These circuits are appealing since other degrees of freedom than the traditional ones (e.g. those of superconducting circuits) can be investigated. I will show how one can use carbon nanotube based quantum dots in that context. In particular, I will focus on how to engineer a coherent spin/photon coupling in a double quantum dot spin-valve and to use this interface to manipulate the electronic spin with cavity photons. Quantum dots also exhibit a wide variety of many body phenomena. The cQED architecture could also be instrumental for understanding them. One of the most paradigmatic phenomenon is the Kondo effect which is at the heart of many electron correlation effects. I will show that a cQED architecture has allowed us to observe the decoupling of spin and charge excitations.