Séminaires Nanoélectronique Quantique

Retrouver tous les "Séminaires Nanoélectronique Quantique" passés et à venir dans cette rubrique.

Le prochain séminaire aura lieu le :
mardi 20 mars 2018 à 14h, dans la salle « Rémy lemaire » (K223), Institut Néel
Inscription obligatoire

Bottom-up grown nanowire quantum devices
Erik Bakkers (Technische Universiteit Eindhoven)

InSb nanowires are used to detect first signatures of quasi particles called Majorana fermions. Recently, different schemes for performing braiding operations and uncovering the non-Abelian statistics of Majorana fermions are proposed. Such operations are fundamental for topological quantum computing. For such a universal computational architecture the realization of a near-perfect nanowire network assembly is needed in which Majorana states are coherently coupled.
Here, we demonstrate a generic process by which we can design any proposed braiding device by manipulating an InP substrate and thereby the nanowire growth position and orientation [1]. This approach combines recent advances in materials growth and theoretical proposals. Our method leads to highly controlled growth of InSb nanowire networks with single crystalline wire-wire junctions. Additionally, nanowire “hashtag” structures are grown with a high yield and contacted. In these devices, the Aharonov–Bohm (AB) effect is observed, demonstrating phase coherent transport. These measurements reveal the high quality of these structures. This generic platform will open new applications in quantum information processing. Furthermore, these structures are well suited for epitaxial shadow growth of a superconductor on the nanowire facets. We study the growth of superconductors on nanowires and reveal the electronic properties.

1. S. Gazibegovic et al. Nature 548 (2017), 434

Contact : Erik Bakkers

Les Organisateurs.
M. Hocevar, B. Sacepe, R. Whitney, C. Groth

Si vous souhaitez planifier des invitations, merci de nous contacter à l’adresse suivante :



19 décembre 2017
Tailoring supercurrent confinement in graphene bilayer weak links de Romain Danneau (Karlsruhe Institute of Technology Germany)
4 décembre 2017
Photonic counterparts of Cooper pairs de Marcelo Franca Santos (Universidade Federal do Rio de Janeiro)
28 novembre 2017
Near-quantum-limited microwave amplification and nonreciprocal transmission using engineered mechanical dissipation de Alexey Feofanov (EPFL Lausanne)
14 novembre 2017
Electron Transfer between Quantum Dots de Tobias Krähenmann (ETH Zurich)
7 novembre 2017
The Josephson effect in semiconductor channels : From fundamental science to qubit applications de Attila Geresdi (QuTech & Kavli Institute of Nanoscience, Delft University of Technology)
17 octobre 2017
Superconducting microwave cavities as memories for modular quantum information processing de Wolfgang Pfaff (Yale University, USA)
10 octobre 2017
From single magnetic adatoms on superconductors to coupled spin chains
de Katharina Franke (Freie Universität Berlin)

26 septembre 2017
Revealing a quantum phase transition with a Kondo circuit de Zubair Iftikhar (SPEC, CEA)
19 septembre 2017
Tinkering with Majoranas de Anton Akhmerov (TU Delft)
11 juillet 2017
The role of electron-electron interactions in graphene de Shaffique Adam (National University of Singapore)
20 juin 2017
Charge quantum interference device on superconducting nano-wires de Oleg Astafiev (Royal Holloway, University of London)
13 juin2017
Evolving functionality in nanomaterial networks de Wilfred G. van der Wiel (University of Twente, The Netherlands)
6 juin2017
Relaxation of an Electron Spin in a Moving Quantum Dotby Xuedong Hu (Department of Physics, University at Buffalo, USA)
30 mai
Understanding and exploiting interactions between components in quantum circuits de Philippe Joyez (SPEC, CEA-Saclay)
22 mai 2017
Feedback-tuned high fidelity gates for (GaAs based) two-electron spin qubits
de Hendrik Bluhm (RWTH Aachen University, Allemagne)

16 mai 2017
Electron teleportation in multi-terminal Majorana islands : Kondo effect at high temperature de Karen Michaeli (Weizmann Institute for Science, Israel)
9 mai 2017
Superconducting Atom Chips de Rainer Dumke (Nanyang Technological University, Singapore)
4 mai 2017
Quantum Physics in One Dimension using Nanostructured Josephson-junction Arrays de Tim Duty (University of New South Wales, Sydney)
20 avril 2017
Les bits quantiques MOS de Prof. Michel Pioro-Ladrière (Professeur associé, Département de physique, Université de Sherbrooke et Directeur adjoint, Institut Quantique, Université de Sherbrooke)
11 avril 2017
Quantum microwave devices based on inelastic Cooper pair tunneling de Max Hofheinz (CEA INAC)
28 mars 2017
Spin to charge conversion at room temperature using spin orbit coupling and recently discovered topological insulators de Laurent Vila (SPINTEC)
21 mars 2017
Spin Dynamics in Out-of-Equilibrium Superconductors de Charis Quay (Laboratoires de Physique des Solides, Université Paris Sud)
14 février 2017
Quantized circular photogalvanic effect in Weyl semimetals de Adolfo Grushin (Department of Physics, UC Berkeley et Institut Néel, CNRS & UGA)
7 février 2017
Confining the state of light to a quantum manifold by engineered two-photon loss de Zaki Leghtas (Laboratoire Pierre Aigrain - Ecole Normale Supérieure)
31 janvier 2017
Many-Body Localization Basics - Recent Highlights - Experimental possibilities de Nicolas Laflorencie (Laboratoire de Physique Théorique, Toulouse)
24 janvier 2017
Fluctuation theorems in engineered environments de Marcelo F. Santos (Universidade Federal do Rio de Janeiro, Brésil)
17 janvier 2017
THz Spectroscopy on Disordered Superconductors and the “Superconducting Dome” of Granular Aluminum de Marc Scheffler (Physikalisches Institut, University of Stuttgart, Germany)
10 janvier 2017
Mesoscopic Spectroscopy with Josephson Junctions de Caglar GIRIT (Collège de France, Paris)



Séminaire - Nam-Joon Cho

mardi 27 mars 2018 - 14h00 - Grenoble INP - Phelma

Inscriptions obligatoires http://fondation-nano.g

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Séminaire Nanoélectronique Quantique : Ramon Aguado

mardi 3 avril 2018 - 14h00 - Salle « Remy Lemaire » (K223)

Quantum dot physics in Majorana nanowires (...)

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Séminaire Nanoélectronique Quantique : Lucila Peralta Gavensky

mardi 24 avril 2018 - 14h00 - Salle « Remy Lemaire » (K223)

Topological aspects of driven condensed (...)

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