Séminaires Nanoélectronique Quantique

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

Le dernier séminaire a eu lieu le :
Mardi 20 juin 2017 à 14h
Salle Rémy Lemaire - Institut Néel
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Oleg Astafiev (Royal Holloway, University of London)
Charge quantum interference device on superconducting nano-wires

The Coherent Quantum Phase Slip (CQPS) effect in superconducting nanowires is exactly dual to the Josephson effect – tunneling of Cooper pairs through a thin dielectric layer. CQPS has been experimentally demonstrated for the first time in Ref. [1] and since then reproduced in different materials [2, 3]. CQPS is interesting from the fundamental point of view as well as for practical applications, particularly, for quantum metrology as it promises to build quantum current standards dual to voltage standards on the Josephson effect. An important milestone in this direction is demonstration of interference of a pair of flux tunneling amplitudes similarly to charge tunneling amplitudes in SQUIDs. We demonstrate a device exactly dual to SQUIDs, consisting of a superconducting island with two nanowires. This represents a charge quantum interference device (CQUID). The two tunneling amplitudes interfere and the effective tunneling energy depends on the gate induced charge on the island. In our experiment, the CQUID is incorporated into a superconducting loop, forming a phase-slip qubit with tunable energy. Such a circuit allows to measure the CQPS energy and is exactly dual to the charge qubit with a SQUID, where the effective Josephson energy is tuned.

[1] O. V. Astafiev, L. B. Ioffe, S. Kafanov, Yu. A. Pashkin, K. Yu. Arutyunov, D. Shahar, O. Cohen, J. S. Tsai. Nature 484, 355 (2012).
[2] J. T. Peltonen, O. V. Astafiev, Y. P. Korneeva, B. M. Voronov,A. A. Korneev, I. M. Charaev, A. V. Semenov, G. N. Gol’tsman, L. B. Ioffe, T. M. Klapwijk, J. S. Tsai. Phys. Rev. B 88, 220506 (2013).
[3] J. T. Peltonen, Z. H. Peng, Yu. P. Korneeva, B. M. Voronov, A. A. Korneev, A. V. Semenov, G. N. Gol’tsman, J. S. Tsai, and O. V. Astafiev. Phys. Rev. B 94, 180508® (2016).

Contact : Oleg Astafiev

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

Si vous souhaitez planifier des invitations, merci de nous contacter à l’adresse suivante :
equipe-seminaires-nano@fondation-nanosciences.fr

A venir
11 juillet 2017
Shaffique Adam (Singapour)

Passé
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)

13 décembre 2016
Ultrastrong light-matter with propagating photons de Juan José García Ripoll (Institute of Fundamental Physics, Spain)

10 novembre 2016
Exciton states mixing and second harmonics generation in transition metal dichalcogenide monolayers de Mikhail Glazov (Ioffe Institute, Russie)

11 octobre 2016
Quantum Phase Slips and Voltage Fluctuations de Andrei D. Zaikin (Karlsruhe Institute of Technology (KIT), Germany)

4 octobre 2016
2D solids : optical spectroscopies and nano-optomechanics de Antoine Reserbat-Plantey (ICFO Barcelone)

Actualités

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Remise du prix "Science et Humour" de la SFP

mercredi 5 juillet 2017 - 18h30 - Campus d’Orsay de Faculté des Sciences

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Séminaire Nanoélectronique Quantique : Shaffique Adam

mardi 11 juillet 2017 - 14h00 - Salle « Remy Lemaire » (K223)

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