QUANTUM CIRCUIT GROUP

Ecole Normale Supérieure de Lyon

Our research group explores the physics of information in quantum devices, which we design, realize and measure. These objects can be viewed as quantum machines processing information. In contrast with ordinary devices, in which quantum mechanics enters only at the level of individual electrons, the degrees of freedom of these machines at the signal level behave according to the laws of quantum mechanics.
Topics of our current interest include amplification of quantum signals, manifestations of zero point fluctuations in circuits, quantum feedback and trajectory, thermodynamics of quantum information, experimental tests of deviations to quantum theory, microwave quantum optics and quantum measurement.

We are looking for a post-doc starting in the Summer/Fall of 2017. Contact if interested.


Is the group in Paris or in Lyon?

The Quantum Circuit group was funded in 2016 when Benjamin Huard became professor in Ecole Normale Supérieure of Lyon, therefore leaving the Quantum Electronics Group of Ecole Normale Supérieure of Paris. The experimental activities are still located at Ecole Normale Supérieure of Paris until the lab space is ready in Lyon. This will happen in July 2017.

MEMBERS

FACULTY

Benjamin Huard

Benjamin Huard graduated from the Ecole Normale Supérieure of Paris in 2003 and did his PhD studies in the Quantronics group at CEA Saclay (France) with Hugues Pothier. There, he performed experiments aiming at investigating the behavior of electrons in mesoscopic metallic and superconducting conductors. In 2006, he joined the Goldhaber-Gordon group at Stanford University (USA) as a post-doc fellow, and observed the Klein tunneling of electrons in graphene for the first time. In 2008, as a CNRS researcher, he cofounded the Quantum Electronics group at Ecole Normale Supérieure (Paris, France) with Michel Devoret. He received the Saint-Gobain award of the French Physics Society in 2006 and was appointed associate researcher at Ecole Normale Supérieure Paris in 2014. He is a professor at Ecole Normale Supérieure de Lyon since 2016. Publication list

Zaki Leghtas

Zaki was born in Agadir, Morocco. After graduating from high school in Rabat (Morocco), he moved to France where he spent two years near Nice. He then attended the Ecole des Mines, in Paris, for three years, and graduated in 2009. Zaki enrolled in a PhD program at INRIA/Mines under the supervision of Pierre Rouchon and Mazyar Mirrahimi, where he worked on some theoretical aspects of quantum state preparation and stabilization. After he defended his thesis in 2012, he joined the Devoret lab at Yale University and realized experiments on quantum error correction and quantum feedback. He became a member of the Quantic team in December 2015 as a researcher of MinesParisTech. He will join the Hybrid Quantum Circuits team at Ecole Normale Supérieure of Paris in 2017. Publication list

STUDENTS AND POSTDOCS

Danijela Markovic

Danijela Markovic

PhD student since 2014

She is developing quantum information protocols using quantum networks of superconducting circuits and simulating ultra strong coupling in circuit QED.

Sébastien Jezouin

Sébastien Jezouin

Postdoc since 2015

Sébastien did his graduate work in the Quantum Transport group at LPN Marcoussis with Frederic Pierre on the deviations to the Ohm's law in mesoscopic circuits and on the quantization of heat transport in nanocircuits. He is working on quantum thermodynamics, on the demonstration of the dependence of a quantum evolution on the type of detector and on entanglement-based protocols in circuit QED.

Nathanaël Cottet

Nathanaël Cottet

PhD student since 2015

He is working on the realization of thermal machines in the quantum regime based on superconducting circuits. He works on new measurement schemes using fluxonium qubits in the group of Vladimir Manucharyan at JQI in Maryland. He will join the team in Lyon in 2017.

Quentin Ficheux

Quentin Ficheux

PhD student since 2015

He is working on the links between quantum measurement and thermodynamics in superconducting circuits and on the back action of quantum measurements in circuit QED. He will join the team in Lyon in 2017.

Raphaël Lescanne

Raphaël Lescanne

PhD student since 2016

He is working on quantum error correction using Schrödinger cat states of microwave light and on strong nonlinearities in circuit QED. He will stay in Paris under the supervision of Zaki Leghtas in 2017.

Sébastien Jezouin

Théau Peronnin

PhD student since 2016

He is developing quantum information protocols using quantum networks of superconducting circuits. He will join the team in Lyon in 2017.

QUANTIC TEAM

We closely collaborate with the Quantic team which was funded in 2015, and of which we were officially members before moving to Lyon. Quantic is hosted in Paris by Inria, Mines ParisTech and Ecole Normale Supérieure of Paris. The permanent members are listed here.

Alumni from Paris Quantum Electronics group

Landry Bretheau

Landry was a post-doc for 2 years in 2013-2015. Now a postdoctoral fellow at Massachusetts Institute of Technology.

Vladimir Manucharyan

Vlad was a visitor for a few months in 2013. Now professor at the Joint Quantum Institute - University of Maryland.

Jean-Damien Pillet

Jean-Damien was a post-doc for 1 year in 2012. Now postdoctoral fellow at Collège de France, Paris.

François Mallet

Francois Mallet worked in the Quantum Electronics group from 2011 to 2016 as an associate professor at Université Pierre et Marie Curie. Now associate professor in the Hybrid Quantum Circuits team at ENS Paris.

Philippe Campagne

Philippe was a PhD student from 2011 to 2015. Now a postdoctoral fellow in the Quantronics group at CEA Saclay.

Emmanuel Flurin

Emmanuel was a PhD student from 2011 to 2014. Now a postdoctoral fellow at University of California Berkeley.

Nicolas Roch

Nicolas was a post-doc for 3 years from 2010 to 2012. Now CNRS researcher at Institut Néel in Grenoble, France.

François Nguyen

François was a post-doc for 1 year in 2008-2009.

Michel Devoret

Michel H. Devoret, a professor at Yale University since 2002, was appointed to the Chair of Mesoscopic Physics at the College de France in Paris, where he lectured yearly from 2007 to 2012. He co-funded the Quantum electronics group in 2008 with Benjamin Huard and worked in the group for the whole duration of his chair. Website

Former interns

Théau Peronnin (2015)

Pierre Heidmann (2014)

Cyprien Poirier (2014)

Yael Gagnepain (2013)

Jules Denier (2012)

Lauriane Contamin (2012)

Nathanael Cottet (2012)

Lola El Sahmarany (2010)

Florent Baboux (2010)

Elisabeth Bonnefoy (2010)

PUBLICATIONS

ARTICLES

Using Spontaneous Emission of a Qubit as a Resource for Feedback Control P. Campagne-Ibarcq, S. Jezouin, N. Cottet, P. Six, L. Bretheau, F. Mallet, A. Sarlette, P. Rouchon, and B. Huard (2016), Phys. Rev. Lett. 117, 060502 (open access PDF, supplementary information)

Observing quantum state diffusion by heterodyne detection of fluorescence P. Campagne-Ibarcq, P. Six, L. Bretheau, A. Sarlette, M. Mirrahimi, P. Rouchon, and B. Huard (2016), Phys. Rev. X 6, 011002 (open access PDF, supplementary information)

Anatomy of Fluorescence: Quantum trajectory statistics from continuously measuring spontaneous emission A.N. Jordan, A. Chantasri, P. Rouchon and B. Huard (2016), Quantum Stud.: Math. Found. 3: 237. (open access PDF)

Quantum state tomography with measurement imperfections and decoherence P. Six, P. Campagne-Ibarcq, I. Dotsenko, A. Sarlette, B. Huard, and P. Rouchon (2016), Phys. Rev. A 93, 012109 (open access PDF)

Parameter estimation from measurements along quantum trajectories P. Six, P. Campagne-Ibarcq, L. Bretheau, B. Huard, and P. Rouchon (2015), 54th IEEE Conference on Decision and Control

Les microprocesseurs du futur B. Huard (2015), La Recherche 501, 62

Optimal design for the Josephson mixer J.-D. Pillet, E. Flurin, F. Mallet, and B. Huard (2015), Applied Physics Letters 106, 222603 (open access, supplementary information)

Quantum dynamics of an electromagnetic mode that cannot contain N photons L. Bretheau, P. Campagne-Ibarcq, E. Flurin, F. Mallet, and B. Huard (2015), Science, 348, 776 (open access PDF, supplementary information, featured in Arstechnica and Phys.org)

Superconducting quantum node for entanglement and storage of microwave radiation E. Flurin, N. Roch, J.-D. Pillet, F. Mallet and B. Huard (2015), Phys. Rev. Lett. 114, 090503 (open access PDF, supplementary information)

Observing interferences between past and future quantum states in resonance fluorescence P. Campagne-Ibarcq, L. Bretheau, E. Flurin, A. Auffèves, F. Mallet and B. Huard (2014), Phys. Rev. Lett. 112, 180402 (open access PDF, supplementary information)

Stabilizing the trajectory of a superconducting qubit by projective measurement feedback P. Campagne-Ibarcq, E. Flurin, N. Roch, D. Darson, P. Morfin, M. Mirrahimi, M. H. Devoret, F. Mallet and B. Huard (2013), Phys. Rev. X 3, 021008 (open access PDF, supplementary information)

Widely tunable, non-degenerate three-wave mixing microwave device operating near the quantum limitN. Roch, E. Flurin, F. Nguyen, P. Morfin, P. Campagne-Ibarcq, M. H. Devoret and B. Huard (2012), Phys. Rev. Lett. 108, 147701 (open access PDF, supplementary information)


Generating Entangled Microwave Radiation Over Two Transmission Lines E. Flurin, N. Roch, F. Mallet, M. H. Devoret and B. Huard (2012), Phys. Rev. Lett. 109, 183901 (open access PDF,supplementary information, Viewpoint in Physics )

Strong measurement and quantum feedback for persistent Rabi oscillations in circuit QED experiments M. Mirrahimi, B. Huard, and M. H. Devoret, Decision and Control (CDC), 2012 IEEE 51st Annual Conference on (open access PDF)

THESES

Measurement backaction and feedback in superconducting circuits P. Campagne-Ibarcq, PhD thesis, Ecole Normale Supérieure Paris (2015)

Josephson mixer, swiss army knife for microwave quantum optics E. Flurin, PhD thesis, Ecole Normale Supérieure Paris (2014)

Quantum information with superconducting circuits B. Huard, Habilitation thesis, Ecole Normale Supérieure Paris (2014)

EDITED BOOKS

Quantum microwaves Edited by B. Huard, F. Portier and M. Hofheinz (2016), Comptes Rendus Physique 17, 679-804. (Foreword)

Quantum Machines: Measurement and Control of Engineered Quantum Systems Lecture Notes of the Les Houches Summer School: Volume 96, July 2011 Edited by M. Devoret, B. Huard, R. Schoelkopf, and L. F. Cugliandolo (2014), Oxford University Press

CONTACT

Do you want to join the group?

Do you want information on what we do?

ENS Lyon Site Monod, Building M1, Room 151
46 allée d'Italie, 69364 Lyon cedex 07, France
Email:
Phone: (+33) 1 44 32 35 77


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