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- Research Interests: Ptolemaic and Roman Egypt , Musical Iconography , Animals in Roman spectacles , Ancient Soundscapes , Classical Archaeology , and Physique () edit
- About: I am a CNRS Research Director at the Ecole Normale Superieure of Paris. I have a primary research activity in Theoret... more I am a CNRS Research Director at the Ecole Normale Superieure of Paris. I have a primary research activity in Theoretical Physics and a secondary research activity in Archaeomusicology. I have performed an experimental PhD on superconducting quantum bits (Saclay, France, 1999-2002). This work lead to the first superconducting quantum bit prototype with a lifetime of the order of a microsecond (Science 296, 886 (2002)). After this thesis, I became a theorist of hybrid mesoscopic and nanoscopic structures. I was a post-doc in Basel, Switzerland (2002-2005), and then Paris (2005-2008), working on spin dependent transport in quantum dots as well as superconducting and ferromagnetic proximity effects. My highlights include the development of nanospintronics with carbon nanotubes (Nature Phys. 1, 99 (2005)), and predictions of positive current cross-correlations in quantum dot circuits (Phys. Rev. Lett. 92, 206801 (2004)/ Phys. Rev. B 70, 115315 (2004)), which were confirmed experimentally by the team of Prof. C. Marcus. I am now focusing on the development of Cavity Quantum Electrodynamics with hybrid nanocircuits, in close collaboration with the experimental "Hybrid Quantum Circuits" team headed by Takis Kontos. The first experimental results of this collaboration include a coherent spin/photon coupling at the single spin level (Science 349, 6246 (2015)) and the observation of the frozen charge dynamics in a Kondo impurity (Nature 545, 71 (2017)). Very recently, I have also started working on the quantum detection of the Dark Matter and on the superconductivity effect in Weyl semimetals. My secondary research activity on archeomusicology focuses on concussion idiophones, which are small percussion instruments such as castanets or cymbals. I have recently published two peer-reviewed articles on cymbals playing in the Roman Empire, in the journals "CLARA" hosted by the Historical Museum of Oslo and "Early Music" edited by Oxford Academic. (I am a CNRS Research Director at the Ecole Normale Superieure of Paris. I have a primary research activity in Theoretical Physics and a secondary research activity in Archaeomusicology. <br /><br />I have performed an experimental PhD on superconducting quantum bits (Saclay, France, 1999-2002). This work lead to the first superconducting quantum bit prototype with a lifetime of the order of a microsecond (Science 296, 886 (2002)). After this thesis, I became a theorist of hybrid mesoscopic and nanoscopic structures. I was a post-doc in Basel, Switzerland (2002-2005), and then Paris (2005-2008), working on spin dependent transport in quantum dots as well as superconducting and ferromagnetic proximity effects. My highlights include the development of nanospintronics with carbon nanotubes (Nature Phys. 1, 99 (2005)), and predictions of positive current cross-correlations in quantum dot circuits (Phys. Rev. Lett. 92, 206801 (2004)/ Phys. Rev. B 70, 115315 (2004)), which were confirmed experimentally by the team of Prof. C. Marcus. I am now focusing on the development of Cavity Quantum Electrodynamics with hybrid nanocircuits, in close collaboration with the experimental "Hybrid Quantum Circuits" team headed by Takis Kontos. The first experimental results of this collaboration include a coherent spin/photon coupling at the single spin level (Science 349, 6246 (2015)) and the observation of the frozen charge dynamics in a Kondo impurity (Nature 545, 71 (2017)). Very recently, I have also started working on the quantum detection of the Dark Matter and on the superconductivity effect in Weyl semimetals.<br /><br />My secondary research activity on archeomusicology focuses on concussion idiophones, which are small percussion instruments such as castanets or cymbals. I have recently published two peer-reviewed articles on cymbals playing in the Roman Empire, in the journals "CLARA" hosted by the Historical Museum of Oslo and "Early Music" edited by Oxford Academic.) edit
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Publication Date: Nov 14, 2003
Publication date: jan 4, 2005, publication date: 2001, publication name: macroscopic quantum coherence and quantum computing, research interests: physics , superconductivity , transistor , and amplifier (), publication date: 2004, publication name: quantum computing and quantum bits in mesoscopic systems, research interests: physics (), publication date: 2003, publication name: new directions in mesoscopic physics (towards nanoscience), research interests: computer science , quantum computer , and quantum gate (), publication date: 2002, publication name: international workshop on superconducting nano-electronics devices, research interests: physics and coulomb blockade (), publication name: physica scripta, research interests: physics , quantum information , mathematical sciences , physical sciences , quantum decoherence theory , and 4 more constant time delay , excited states , transition period , and superposition principle ( constant time delay , excited states , transition period , and superposition principle ), publisher: american association for the advancement of science (aaas), publication name: science, research interests: physics , microwave , science , medicine , multidisciplinary , and 5 more quantum coherence , electrical circuit theory , quantum , quality factor , and radio frequency ( quantum coherence , electrical circuit theory , quantum , quality factor , and radio frequency ), publisher: american physical society (aps), publication name: physical review letters, research interests: physics , condensed matter physics , medicine , physical sciences , and ddc (), publisher: elsevier bv, publication name: physica e: low-dimensional systems and nanostructures, research interests: materials engineering , physics , quantum mechanics , nanotechnology , quantum coherence , and 6 more electrical circuit theory , quantum , quantum circuits , degree of freedom , electronic circuit , and building block ( electrical circuit theory , quantum , quantum circuits , degree of freedom , electronic circuit , and building block ), publication name: physica c: superconductivity, research interests: materials engineering , physics , condensed matter physics , quantum coherence , quantum computer , and electrical and electronic engineering (), publisher: wiley-blackwell, publication name: fortschritte der physik, research interests: physics , quantum physics , microwave , protein science , electrical circuit theory , and 6 more mathematical sciences , physical sciences , oscillations , precession , excited states , and spin echo ( mathematical sciences , physical sciences , oscillations , precession , excited states , and spin echo ), publisher: university of oslo library, publication date: 2022, publication name: clara, research interests: flute and clara (), publisher: oxford university press (oup), publication date: 2021, publication name: early music, research interests: early music , art , and dance (), publication name: physical review b, research interests: physics , quantum mechanics , mesoscopic physics , physical , and photon (), publisher: springer science and business media llc, publication date: 2019, publication name: npj quantum information, research interests: physics and quantum (), publication date: 2014, research interests: physics , physical sciences , and chemical sciences (), publication date: 2011, research interests: physics , magnetic field , physical sciences , electron transport , chemical sciences , and spin polarization (), publication name: nature materials, research interests: multidisciplinary and nature materials (), doi: 10.1103/physrevb.102.155105.
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Implementation of a quantum bit in a superconducting circuit
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Audrey Cottet
Il existe des projets d'ordinateurs quantiques pour resoudre certains problemes difficiles, comme la factorisation des grands nombres, beaucoup plus rapidement qu'avec un ordinateur classique. L'unite de base de l'ordinateur quantique est un systeme quantique a deux niveaux nomme bit quantique, qui doit satisfaire des criteres tres stricts. Parmi les nombreux systemes proposes pour realiser un bit quantique, les circuits electroniques sont des candidats interessants en raison de leur grande integrabilite. L'objet ce cette these est de realiser un bit quantique a partir d'un circuit supraconducteur a base de jonctions Josephson nomme ``boite a paires de Cooper''. L'etat de cette boite peut etre determine soit par une mesure de courant, soit par une mesure de charge. Dans cette these sont etudiees trois differentes strategies pour realiser le bit quantique, qui different par le mode de lecture de l'etat de la boite. Pour chaque strategie, le tem...
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Implementing Qubits with Superconducting Integrated Circuits
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- Michel H. Devoret 2 &
- John M. Martinis 3 , 4
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Superconducting qubits are solid state electrical circuits fabricated using techniques borrowed from conventional integrated circuits. They are based on the Josephson tunnel junction, the only non-dissipative, strongly non-linear circuit element available at low temperature. In contrast to microscopic entities such as spins or atoms, they tend to be well coupled to other circuits, which make them appealling from the point of view of readout and gate implementation. Very recently, new designs of superconducting qubits based on multi-junction circuits have solved the problem of isolation from unwanted extrinsic electromagnetic perturbations. We discuss in this review how qubit decoherence is affected by the intrinsic noise of the junction and what can be done to improve it.
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Devoret, M.H., Martinis, J.M. (2005). Implementing Qubits with Superconducting Integrated Circuits. In: Everitt, H.O. (eds) Experimental Aspects of Quantum Computing. Springer, Boston, MA. https://doi.org/10.1007/0-387-27732-3_12
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Coupling a quantum dot, fermionic leads, and a microwave cavity on a chip
Affiliation.
- 1 Laboratoire Pierre Aigrain, Ecole Normale Supérieure, CNRS UMR 8551, Laboratoire associé aux universités Pierre et Marie Curie et Denis Diderot, 24, rue Lhomond, 75231 Paris Cedex 05, France.
- PMID: 22243102
- DOI: 10.1103/PhysRevLett.107.256804
We demonstrate a hybrid architecture consisting of a quantum dot circuit coupled to a single mode of the electromagnetic field. We use single wall carbon nanotube based circuits inserted in superconducting microwave cavities. By probing the nanotube dot using a dispersive readout in the Coulomb blockade and the Kondo regime, we determine an electron-photon coupling strength which should enable circuit QED experiments with more complex quantum dot circuits.
© 2011 American Physical Society
Decoherence in a superconducting quantum bit circuit
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Dr. Audrey Cottet
Academic research director at CNRS
Research topics in Physics :
Quantum Detection of Dark Matter
Quantum Electrodynamics with hybrid nanocircuits
Superconducting and ferromagnetic proximity effects
Archaeomusicology (secondary research activity)
History of concussion idiophones
Professional addresses : laboratory LPENS at the Ecole Normale Supérieure of Paris
laboratory LPEM at the ESPCI Paris
Contact : audrey[dot]cottet[at]ens[dot]fr
Short CV - Publications in Physics - Archaeomusicology
LKB - Quantum fluctuation and relativity
Most of them available on thesis servers, in french or in english (as indicated by the titles below).
COMMENTS
PDF | On Sep 30, 2002, Audrey Cottet published Implementation of a quantum bit in a superconducting circuit | Find, read and cite all the research you need on ResearchGate
2002 [7] "Superconducting ... PhD Thesis Implementation of a quantum bit in a superconducting circuit, Université Paris VI, 2002. HDR Thesis ...
Département de Physique de l'Ecole Normale supérieure
Audrey Cottet: Implementation of a quantum bit in a superconducting circuit: 2002: Ronald Cron: Les contacts atomiques : un banc d'essai pour la physique mésoscopique: 2001: Frédéric Pierre: Electron-electron interaction in mesoscopic wires (in French), also in Ann. Phys. Fr., Vol. 26, N°4 2001, pp. 1-192: 2000: Vincent Bouchiat
DOI: 10.1016/S0921-4534(01)01014- Corpus ID: 73570111; Implementation of a combined charge-phase quantum bit in a superconducting circuit @article{Cottet2002ImplementationOA, title={Implementation of a combined charge-phase quantum bit in a superconducting circuit}, author={Audrey Cottet and Denis Vion and A. Aassime and P. Joyez and Daniel Est{\`e}ve and Michel H. Devoret}, journal={Physica ...
A. Cottet, Implementation of a quantum bit in a superconducting circuit, PhD Thesis, Universit ´e Paris 6, 2002. A. Abragam, Principles of Nuclear Magnetic Resonance (Oxford University Press, Oxford, 1985).
Audrey Cottet, École Normale Supérieure, Physique Department, Faculty Member. ... (2002)). After this thesis, I became a theorist of hybrid mesoscopic and nanoscopic structures. I was a post-doc in Basel, Switzerland (2002-2005), and then Paris (2005-2008), working on spin dependent transport in quantum dots as well as superconducting and ...
LPENS, Ecole Normale Superieure and LPEM, ESPCI Paris - Cited by 6,325 - Condensed Matter Physics - Archaeomusicology ... A Cottet, D Vion, A Aassime, P Joyez, D Esteve, MH Devoret. Physica C: Superconductivity 367 (1-4), 197-203, 2002. 119: ... PhD Thesis, Université Paris 6, 2002. 113: 2002: Synthetic spin ...
In this paper, we discuss a qubit circuit which is controlled both by a charge and by a phase. In this combined charge-phase qubit, qubit control is performed by acting on the gate charge like in the Cooper-pair box, but the measured quantity is a supercurrent, like in the flux box. The main interest of this Q - δ design is to provide (i) a ...
She first performed an experimental PhD on superconducting quantum bits (Saclay, France, 1999-2002). ... (2002)). After her thesis, Audrey became a theorist of hybrid mesoscopic and nanoscopic structures. She was a post-doc in Basel, Switzerland (2002-2005), and then Paris (2005-2008), working on spin dependent transport in quantum dots as well ...
In the Cooper-pair box, the qubit states a phase. In this combined charge-phase qubit, qubit control is performed by acting on the gate charge like in the Cooper-pair box, but the mea- * Corresponding author. Tel.: +33-016-908-5529; fax: +33- sured quantity is a supercurrent, like in the flux 016-908-7442. box.
experimental thesis on Josephson superconducting circuits in the Quantronics group of Saclay (1999-2002). Then, I did a technical retraining during six years of post-doctoral studies (Basel (2002-2005), Orsay (2005-2007), Jussieu (2007{2008)) in order to become a condensed matter theorist. During these years, I studied the theory of quantum dot
Decoherence is there a key issue since electrical circuits are more prone to decoherence than microscopic objects such as atoms. We introduce the different families of solid state qubits, which are either based on single particle states in semiconductor nanostructures, or on global quantum states of superconducting Josephson circuits.
Audrey is primarily a physicist, working as a permanent CNRS researcher at the LPENS (Ecole Normale Supérieure, Paris). Her research themes include Cavity Quantum Electrodynamics with hybrid ...
[15] Vion D, Aassime A, Cottet A, Joyez P, Pothier H, Urbina C, Esteve D and Devoret M H 2002 Manipulating the quantum state of an electrical circuit Science 296 886-9. Crossref; Google Scholar [16] Martinis J M, Nam S, Aumentado J and Urbina C 2002 Rabi oscillations in a large Josephson-junction qubit Phys. Rev. Lett. 89 117901. Crossref ...
A. Cottet, Implementation of a quantum bit in a superconducting circuit, PhD Thesis, Université Paris 6, 2002. Google Scholar A. Abragam, Principles of Nuclear Magnetic Resonance (Oxford University Press, Oxford, 1985). Google Scholar
Ph.D. THESIS OF THE UNIVERSITY OF PARIS VI Department : ELECTRONICS, COMMUNICATIONS AND COMPUTER SCIENCE Presented by : Hassan ABOUSHADY Thesis submitted to obtain the degree of DOCTOR OF THE UNIVERSITY OF PARIS VI DESIGN FOR REUSE OF CURRENT-MODE CONTINUOUS-TIME ANALOG-TO-DIGITAL CONVERTERS January 7, 2002 Committee in charge :
10/2005 - 09/2008: Post-doctoral researcher in Paris, France (LPS/Orsay, LPTHE/University Paris VI) 11/2002 - 09/2005: Post-doc in the Condensed Matter Theory Group, Univ. of Basel, Switzerland . 10/1999 - 10/2002: PhD in the Quantronics group (CEA-Saclay, France) Main achievements in Physics
M R Delbecq 1 , V Schmitt, F D Parmentier, N Roch, J J Viennot, G Fève, B Huard, C Mora, A Cottet, T Kontos. Affiliation 1 Laboratoire Pierre Aigrain, Ecole Normale Supérieure, CNRS UMR 8551, Laboratoire associé aux universités Pierre et Marie Curie et Denis Diderot, 24, rue Lhomond, 75231 Paris Cedex 05, France. PMID: 22243102 DOI: ...
Different approaches have been devised to cure this problem for superconducting qubits, a prime example being the operation of such devices at optimal working points, so-called "sweet spots." This latter approach led to significant improvement of T 2 T_2 T 2 times in Cooper pair box qubits [D. Vion et al., Science 296, 886 (2002)]. Here, we ...
Decoherence in quantum bit circuits is presently a major limitation to their use for quantum computing purposes. We present experiments, inspired from NMR, that characterize decoherence in a particular superconducting quantum bit circuit, the quantronium.
Quantum Electrodynamics with hybrid nanocircuits. Superconducting and ferromagnetic proximity effects. Archaeomusicology (secondary research activity) History of concussion idiophones. Professional addresses: laboratory LPENS at the Ecole Normale Supérieure of Paris. laboratory LPEM at the ESPCI Paris. Contact: audrey [dot]cottet [at]ens [dot]fr.
PhD thesis. Most of them available on thesis servers, in french or in english (as indicated by the titles below). Crépin, Pierre-Philippe (2019), "Quantum reflection of a cold antihydrogen wavepacket". Thesis at Université Pierre et Marie Curie - Paris VI, TEL server. Maury, Axel (2016), "Effet Casimir-Polder sur des atomes piégés".