Quantum Nanoelectronics Seminars

All the "Quantum Nanoelectronics Seminars" past and future in this section.

The next seminar will be held on :
Tuesday 17 October 2017 at 2pm, Room Rémy Lemaire, Institut Néel
Mandatory registration

Superconducting microwave cavities as memories for modular quantum information processing
Wolfgang Pfaff (Yale University, USA)

Superconducting cavities can store microwave fields for several milliseconds, naturally making them a promising system for realizing memories for superconducting circuits. In this talk, I will present our approach for using cavities that are coupled to Josephson qubits as long-lived quantum memories. We show that 3D cavities made from bulk superconductors can be used to store quantum states on millisecond time scales [1]. We further demonstrate that these systems are capable of processing and protecting quantum information encoded in complex multiphoton states stored in the cavity [2].
An important consideration is how it is possible to scale up to large quantum information processing architectures from individual cavity systems. We aim to realize a modular architecture in which individual network nodes exchange quantum information through propagating photons in transmission lines [3, 4]. We show that we can, rapidly and on-demand, convert multiphoton quantum states from a cavity memory into propagating channels [5]. This enables us to realize quantum state transfer and entanglement between remote cavity nodes [6].
Our cavity system can thus serve as the backbone in a microwave quantum network. It can be used to realize error-protected distribution of quantum information, and thus provides a route towards a modular quantum computer.

References :
[1] Reagor et al., Phys. Rev. B 94, 014506 (2016)
[2] Ofek et al., Nature 536, 441 (2016)
[3] Kimble, Nature 453, 1023 (2008)
[4] Cirac, Zoller, Kimble, and Mabuchi, Phys. Rev. Lett. 78, 3221 (1998)
[5] Pfaff et al., Nat. Phys. 13, 882 (2017)
[6] Axline, Burkhart, Pfaff, et al., in preparation.

Contact : Wolfgang Pfaff

The organisation committee,
M. Hocevar, B. Sacepe, R. Whitney, C. Groth

If you want to plan invitations, please contact us at the following address :

7 November 2017
Attila Geresdi (Station Q - Qtech - TUDelft)


2017 ➜10 October 2017 (…)

10 October 2017
From single magnetic adatoms on superconductors to coupled spin chains
by Katharina Franke (Freie Universität Berlin)

26 September 2017
Revealing a quantum phase transition with a Kondo circuit by Zubair Iftikhar (SPEC, CEA)
19 September 2017
Tinkering with Majoranas by Anton Akhmerov (TU Delft)
11 July 2017
The role of electron-electron interactions in graphene by Shaffique Adam (National University of Singapore)
20 June 2017
Charge quantum interference device on superconducting nano-wiresby by Oleg Astafiev (Royal Holloway, University of London)
13 June 2017
Evolving functionality in nanomaterial networks by Wilfred G. van der Wiel (University of Twente, The Netherlands)
6 June 2017
Relaxation of an Electron Spin in a Moving Quantum Dotby Xuedong Hu (Department of Physics, University at Buffalo, USA)
30 May 2017
Understanding and exploiting interactions between components in quantum circuits by Philippe Joyez (SPEC, CEA-Saclay)
22 May 2017
Feedback-tuned high fidelity gates for (GaAs based) two-electron spin qubits by Hendrik Bluhm (RWTH Aachen University, Germany)
16 May 2017
Electron teleportation in multi-terminal Majorana islands : Kondo effect at high temperature by Karen Michaeli (Weizmann Institute for Science, Israel)
9 May 2017
Superconducting Atom Chips by Rainer Dumke (Nanyang Technological University, Singapore)
4 May 2017
Quantum Physics in One Dimension using Nanostructured Josephson-junction Arrays by Tim Duty (University of New South Wales, Sydney)
20 April 2017
Les bits quantiques MOS by Prof. Michel Pioro-Ladrière (Professeur associé, Département de physique, Université de Sherbrooke et Directeur adjoint, Institut Quantique, Université de Sherbrooke)
11 April 2017
Quantum microwave devices based on inelastic Cooper pair tunneling by Max Hofheinz (CEA INAC)
28 March 2017
Spin to charge conversion at room temperature using spin orbit coupling and recently discovered topological insulators by Laurent Vila (SPINTEC)
21 March 2017
Spin Dynamics in Out-of-Equilibrium Superconductors by Charis Quay (Laboratoires de Physique des Solides, Université Paris Sud)
14 March 2017
From CMOS transistors to CMOS spin qubits by Marc Sanquer (INAC/PHELIQS/LATEQS CEA & UGA)
14 February 2017
Quantized circular photogalvanic effect in Weyl semimetals by Adolfo Grushin (Department of Physics, UC Berkeley et Institut Néel, CNRS & UGA)
7 February 2017
Confining the state of light to a quantum manifold by engineered two-photon loss by Zaki Leghtas (Laboratoire Pierre Aigrain - Ecole Normale Supérieure)
31 January 2017
Many-Body Localization Basics - Recent Highlights - Experimental possibilities by Nicolas Laflorencie (Laboratoire de Physique Théorique, Toulouse)
24 January 2017
Fluctuation theorems in engineered environments by Marcelo F. Santos (Universidade Federal do Rio de Janeiro, Brazil)
17 January 2017
THz Spectroscopy on Disordered Superconductors and the “Superconducting Dome” of Granular Aluminum by Marc Scheffler (Physikalisches Institut, University of Stuttgart, Germany)
10 January 2017
Mesoscopic Spectroscopy with Josephson Junctions by Caglar GIRIT (Collège de France, Paris)



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mardi 5 décembre 2017 - 08h00 - INSA - Institut National des Sciences Appliquées de Lyon

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Quantum Nanoelectronics Seminar : Attila Geresdi

mardi 7 novembre 2017 - 14h00 - Room « Remy Lemaire » (K223)

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Seminar of Prof. Masato YASUI (KEIO Univ. School of Medicine Vice Dean)

lundi 23 octobre 2017 - 14h30 - Amphithéâtre sud Bat. Jean Roget

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