Berlin 2018 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 79: Superconductivity: Superconducting Electronics - Circuit QED

TT 79.5: Vortrag

Donnerstag, 15. März 2018, 10:30–10:45, H 2053

Strong coupling between a carbon nanotube based quantum dot circuit and a microwave cavity — •Tino Cubaynes, Laure Bruhat, Jeremie Viennot, Matthieu Dartiailh, Matthieu Desjardins, Audrey Cottet, and Takis Kontos — Laboratoire Pierre Aigrain, ENS, Paris 75005, FRANCE

Circuit quantum electrodynamics allows one to probe, manipulate and couple superconducting quantum bits using cavity photons at an exquisite level. One of its cornerstones is the possibility to achieve the strong coupling which allows one to hybridize coherently light and matter. Mesoscopic-QED inherits the c-QED toolbox and applies it to nano-circuits. I will present cavity transmission and simultaneous transport measurements on a quantum dot circuit -a Cooper pair splitter- embedded in a microwave cavity. By using a new cavity-DQD coupling scheme, the strong coupling of a photonic system to a hybrid circuit has been reached [1]. Our findings open the path to ultralong distance entanglement of quantum dot based qubits. They could be adapted to many other circuit designs, shedding new light on the roadmap for scalability of quantum dot setups. I will also present current development on a nanofabrication technique allowing integration of prisitine carbon nanotube in mesoscopic-QED devices. From this perspective we can envision carbon nanotube based circuit with high tunability and very low decoherence.
L. E. Bruhat , T. Cubaynes, et al. arXiv:1612.05214 (2016)