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Exploring the quantum features of large systems

English title Exploring the quantum features of large systems
Applicant Sangouard Nicolas
Number 150579
Funding scheme SNSF Professorships
Research institution Departement Physik Universität Basel
Institution of higher education University of Basel - BS
Main discipline Other disciplines of Physics
Start/End 01.09.2014 - 31.08.2018
Approved amount 1'155'715.00
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Keywords (4)

atomic physics; quantum optics; quantum communications; quantum physics

Lay Summary (French)

Lead
La naissance de la théorie quantique s'est accompagnée d'un grand nombre d'objections, car ses prédictions défies nos intuitions les plus basiques de la réalité physique. Ces objections sont maintenant rares, notamment grâce aux très nombreux résultats expérimentaux soutenant la théorie quantique. Néanmoins, les opinions divergent encore lorsqu'on s'intéresse à des objets macroscopiques. Les effets quantiques peuvent-ils être observés à n'importe quelle échelle ou existe-il une frontière entre les domaines classique et quantique qui interdit l'observation d'effets quantiques à des échelles macroscopiques? Ces questions n'ont pas encore de réponses consensuelles bien qu'elles ait été posées au premier jour de la théorie quantique.
Lay summary

Notre but est d'accompagner le développement d'expériences dont l'objectif est de mettre en évidence des phénomènes quantiques à des échelles macroscopiques. Plus précisément, nous souhaitons démontrer (i) que des effets quantiques peuvent survivre sur des distances de plusieurs centaines de kilomètres, (ii) qu'il est possible d'amplifier des effets quantiques de sorte qu'ils deviennent visible à l'oeil, (iii) qu'un objet massif micrométrique peut avoir un comportement quantique. Au delà de leur intérêt fondamental sur la transition classique/quantique, ces travaux ont d'importantes applications, par exemple, en communication quantique et en métrologie quantique. 

Direct link to Lay Summary Last update: 31.07.2014

Responsible applicant and co-applicants

Employees

Publications

Publication
Witnessing Optomechanical Entanglement with Photon Counting
Ho Melvyn, Oudot Enky, Bancal Jean-Daniel, Sangouard Nicolas (2018), Witnessing Optomechanical Entanglement with Photon Counting, in Physical Review Letters, 121(2), 023602-023602.
Two-Color Pump-Probe Measurement of Photonic Quantum Correlations Mediated by a Single Phonon
Anderson Mitchell D., Tarrago Velez Santiago, Seibold Kilian, Flayac Hugo, Savona Vincenzo, Sangouard Nicolas, Galland Christophe (2018), Two-Color Pump-Probe Measurement of Photonic Quantum Correlations Mediated by a Single Phonon, in Physical Review Letters, 120(23), 233601-233601.
Macroscopic quantum states: Measures, fragility, and implementations
Fröwis Florian, Sekatski Pavel, Dür Wolfgang, Gisin Nicolas, Sangouard Nicolas (2018), Macroscopic quantum states: Measures, fragility, and implementations, in Reviews of Modern Physics, 90(2), 025004-025004.
Long-Range Big Quantum-Data Transmission
Zwerger M., Pirker A., Dunjko V., Briegel H. J., Dür W. (2018), Long-Range Big Quantum-Data Transmission, in Physical Review Letters, 120(3), 030503-030503.
Quantum Optical Memory Protocols in Atomic Ensembles
Chanelière Thierry, Hétet Gabriel, Sangouard Nicolas (2018), Quantum Optical Memory Protocols in Atomic Ensembles, Elsevier, Advances In Atomic, Molecular, and Optical Physics, 77-150.
Randomness Extraction from Bell Violation with Continuous Parametric Down-Conversion
(2018), Randomness Extraction from Bell Violation with Continuous Parametric Down-Conversion, in Physical Review Letters, 150402.
Quantum repeaters based on trapped ions with decoherence-free subspace encoding
Zwerger M, Lanyon B P, Northup T E, Muschik C A, Dür W, Sangouard N (2017), Quantum repeaters based on trapped ions with decoherence-free subspace encoding, in Quantum Science and Technology, 2(4), 044001-044001.
Bell Correlations in a Many-Body System with Finite Statistics
Wagner Sebastian, Schmied Roman, Fadel Matteo, Treutlein Philipp, Sangouard Nicolas, Bancal Jean-Daniel (2017), Bell Correlations in a Many-Body System with Finite Statistics, in Physical Review Letters, 119(17), 170403-170403.
Experimental many-pairs nonlocality
Poh Hou Shun, Cerè Alessandro, Bancal Jean-Daniel, Cai Yu, Sangouard Nicolas, Scarani Valerio, Kurtsiefer Christian (2017), Experimental many-pairs nonlocality, in Physical Review A, 96(2), 022101-022101.
Optimal entanglement witnesses in a split spin-squeezed Bose-Einstein condensate
Oudot Enky, Bancal Jean-Daniel, Schmied Roman, Treutlein Philipp, Sangouard Nicolas (2017), Optimal entanglement witnesses in a split spin-squeezed Bose-Einstein condensate, in Physical Review A, 95(5), 052347-052347.
Proposal for witnessing non-classical light with the human eye
Dodel A., Mayinda A., Oudot E., Martin A., Sekatski P., Bancal J.-D., Sangouard N. (2017), Proposal for witnessing non-classical light with the human eye, in Quantum, 1, 7-7.
Bounding quantum-gravity-inspired decoherence using atom interferometry
Minář Jiří, Sekatski Pavel, Sangouard Nicolas (2016), Bounding quantum-gravity-inspired decoherence using atom interferometry, in Physical Review A, 94(6), 062111-062111.
Generation of single photons with highly tunable wave shape from a cold atomic ensemble
Farrera Pau, Heinze Georg, Albrecht Boris, Ho Melvyn, Chávez Matías, Teo Colin, Sangouard Nicolas, de Riedmatten Hugues (2016), Generation of single photons with highly tunable wave shape from a cold atomic ensemble, in Nature Communications, 7, 13556-13556.
Two-dimensional quantum repeaters
Wallnöfer J., Zwerger M., Muschik C., Sangouard N., Dür W. (2016), Two-dimensional quantum repeaters, in Physical Review A, 94(5), 052307-052307.
Demonstration of Light-Matter Micro-Macro Quantum Correlations
Tiranov Alexey, Lavoie Jonathan, Strassmann Peter C., Sangouard Nicolas, Afzelius Mikael, Bussières Félix, Gisin Nicolas (2016), Demonstration of Light-Matter Micro-Macro Quantum Correlations, in Physical Review Letters, 116(19), 190502-190502.
What does it take to detect entanglement with the human eye?
Vivoli Valentina Caprara, Sekatski Pavel, Sangouard Nicolas (2016), What does it take to detect entanglement with the human eye?, in Optica, 3(5), 473-473.
Bell correlations in a Bose-Einstein condensate
Schmied R., Bancal J.-D., Allard B., Fadel M., Scarani V., Treutlein P., Sangouard N. (2016), Bell correlations in a Bose-Einstein condensate, in Science, 352(6284), 441-444.
Probing wave function collapse models with a classically driven mechanical oscillator
Ho Melvyn, Lafont Ambroise, Sangouard Nicolas, Sekatski Pavel (2016), Probing wave function collapse models with a classically driven mechanical oscillator, in New Journal of Physics, 18(3), 033025-033025.
Proposal for an Optomechanical Bell Test
Vivoli V. Caprara, Barnea T., Galland C., Sangouard N. (2016), Proposal for an Optomechanical Bell Test, in Physical Review Letters, 116(7), 070405-070405.
Heralded amplification of photonic qubits
Bruno Natalia, Pini Vittorio, Martin Anthony, Verma Varun B., Nam Sae Woo, Mirin Richard, Lita Adriana, Marsili Francesco, Korzh Boris, Bussières Félix, Sangouard Nicolas, Zbinden Hugo, Gisin Nicolas, Thew Rob (2016), Heralded amplification of photonic qubits, in Optics Express, 24(1), 125-125.
Challenging preconceptions about Bell tests with photon pairs
Valentina Caprara Vivoli, Pavel Sekatski, Jean Daniel Bancal, Charles C.W. Lim, Brad C. Christensen, Anthony Martin, Rob T. Thew, Hugo Zbinden, Nicolas Gisin, Nicolas Sangouard (2015), Challenging preconceptions about Bell tests with photon pairs, in Phys. Rev. A, 91, 012107.
Comparing different approaches for generating random numbers device-independently using a photon pair source
Valentina Caprara Vivoli, Pavel Sekatski, Jean Daniel Bancal, Charles C. W. Lim, Anthony Martin, Rob T. Thew, Hugo Zbinden, Nicolas Gisin, Nicolas Sangouard (2015), Comparing different approaches for generating random numbers device-independently using a photon pair source, in New Journal of Physics, 17, 023023.
Linking measures for macroscopic quantum states via photon–spin mapping
Florian Frowis, Nicolas Sangouard, Nicolas Gisin (2015), Linking measures for macroscopic quantum states via photon–spin mapping, in Optics Communications, 337, 2.
Revealing genuine optical-path entanglement
F. Monteiro, V. Caprara Vivoli, T. Guerreiro, A. Martin, J.-D. Bancal, H. Zbinden, R.T. Thew, N. Sangouard (2015), Revealing genuine optical-path entanglement, in Phys. Rev. Lett., 114, 170504.
Two-mode squeezed states as Schrodinger-cat-like states
E. Oudot, P. Sekatski, F. Fröwis, N. Gisin, N. Sangouard (2015), Two-mode squeezed states as Schrodinger-cat-like states, in J. Opt. Soc. Am. B, 32, 2190.
Nonlinear Interaction between Single Photons
Guerreiro T., Martin A., Sanguinetti B., Pelc J. S., Langrock C., Fejer M. M., Gisin N., Zbinden H., Sangouard N., Thew R. T. (2014), Nonlinear Interaction between Single Photons, in Physical Review Letters, 113(17), 173601-173601.
How Difficult Is It to Prove the Quantumness of Macroscropic States?
Sekatski Pavel, Gisin Nicolas, Sangouard Nicolas (2014), How Difficult Is It to Prove the Quantumness of Macroscropic States?, in Physical Review Letters, 113(9), 090403-090403.
Heralded Single-Phonon Preparation, Storage, and Readout in Cavity Optomechanics
Galland Christophe, Sangouard Nicolas, Piro Nicolas, Gisin Nicolas, Kippenberg Tobias J. (2014), Heralded Single-Phonon Preparation, Storage, and Readout in Cavity Optomechanics, in Physical Review Letters, 112(14), 143602-143602.
Macroscopic Optomechanics from Displaced Single-Photon Entanglement
Sekatski Pavel, Aspelmeyer Markus, Sangouard Nicolas (2014), Macroscopic Optomechanics from Displaced Single-Photon Entanglement, in Physical Review Letters, 112(8), 080502-080502.
Witnessing single-photon entanglement with local homodyne measurements: analytical bounds and robustness to losses
M. Ho, O. Morin, J.D. Bancal, N. Gisin, N. Sangouard, J. Laurat (2014), Witnessing single-photon entanglement with local homodyne measurements: analytical bounds and robustness to losses, in New Journal of Physics, 16, 103035.

Collaboration

Group / person Country
Types of collaboration
Universite Paris Sud and Paris VI France (Europe)
- Publication
Chalmers University of Technology Sweden (Europe)
- Publication
Department of Physics/University of Basel Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
Institut de Ciencies Fotoniques Spain (Europe)
- Publication
Institute of Quantum Information Science and Department of Physics and Astronomy, University of Calg Canada (North America)
- Publication
Université de Geneve Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Ludwig Maximilians Universitat Germany (Europe)
- Publication

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
Prospects for plasmonics for quantum information Talk given at a conference Towards a device-independent certification of building blocks of quantum networks 26.06.2018 Aspenäs, Sweden Sangouard Nicolas;
QSIT Winter School Talk given at a conference Secure communications from Bell's theorem 06.02.2018 Arosa, Switzerland Sangouard Nicolas;
Workshop « WE-Heraeus-Seminar on Quantum Networks » Talk given at a conference Certification of quantum networks from Bell's theorem 05.02.2018 Bad Honnef, Germany Sangouard Nicolas;
2de Workshop for Quantum Repeaters and Networks Talk given at a conference Towards a device-independent certification of building blocks of quantum networks 24.09.2017 Seefeld, Austria Sangouard Nicolas;
17th Asian Quantum Information Science Conference Talk given at a conference Bell correlations in a BEC 04.09.2017 singapore, Singapore Sangouard Nicolas;
Special Colloquium Universitat Bonn Individual talk Entanglement detection with the human eye 09.05.2017 Bonn, Germany Sangouard Nicolas;
Linnaeus colloquium, Chalmers University of Technology Individual talk Implementation and certification of quantum networks 22.09.2016 Göteborg, Sweden Sangouard Nicolas;
Workshop on « Quantum information » Talk given at a conference Bell-correlations in a BEC 26.06.2016 Seefeld, Austria Sangouard Nicolas;
Workshop « WE-Heraeus-Seminar on Macroscopic Entanglement » Talk given at a conference What does it take to see entanglement? 17.01.2016 Bad Honnef, Germany Sangouard Nicolas;
Invited conference at Ecole Normale Supérieure Talk given at a conference Macroscopic Entanglement 14.12.2015 Paris, France Sangouard Nicolas;
Experimental tests of quantum reality Talk given at a conference Macroscopic entanglement 28.09.2015 Oxford, Great Britain and Northern Ireland Sangouard Nicolas;
International conference on Quantum Information Processing and Communication (QIPC 2015) Talk given at a conference Bell- correlations in a BEC 13.09.2015 Leeds, Great Britain and Northern Ireland Sangouard Nicolas;
Summer School Les Houches on optomechanics Poster Probing wave function collapse models with a classically driven mechanical oscillator 03.08.2015 Les Houches, France Ho Hui Kiat Melvyn;
Quantum Systems and Technology Poster Two-mode squeezed states as Schrodinger-cat-like states 07.06.2015 Monte Verita, Ascona, Switzerland Oudot Enky;
Quantum Systems and Technology Poster Probing wave function collapse models with a classically driven mechanical oscillator 07.06.2015 Monte Verita, Ascona, Switzerland Ho Hui Kiat Melvyn;
Photons beyond qubits 2015 Talk given at a conference Macroscopic entanglement 16.03.2015 Olomouc, Czech Republic Sangouard Nicolas;
NCCR QSIT General Meeting Talk given at a conference Macroscopic Entanglement 07.01.2015 Arosa, Switzerland Sangouard Nicolas;
Greatest Inspiration Sure Is Nonlocality (Gisin2014) Talk given at a conference Macroscopic Entanglement 08.09.2014 Riederalp, Switzerland Sangouard Nicolas;


Communication with the public

Communication Title Media Place Year
Media relations: print media, online media Bizarre 'Bell' entanglement is spotted in large numbers of atoms for the first time dailymail International 2016
Media relations: print media, online media Human eye might be able to detect entangled photons Ars Technica International 2016
Print (books, brochures, leaflets) Seeing quantum superpositions Western Switzerland 2016
Media relations: radio, television The atom without properties phys.org International 2016
Media relations: print media, online media The experiment that will allow humans to “see” quantum entanglement MIT Technology Review (2016) International 2016
Talks/events/exhibitions ublic talk on « Théorie de l’information et théorie quantique, un mariage heureux pour la physique f International 2016
Media relations: print media, online media La recherche Western Switzerland 2015

Awards

Title Year
The Paul Ehrenfest Best Paper Award for Quantum Foundations for the year 2017 2018

Associated projects

Number Title Start Funding scheme
149109 Large entanglement in crystals 01.06.2014 Project funding (Div. I-III)
179109 Certifying the quantum nature of complex systems from Bell's theorem 01.09.2018 SNSF Professorships

Abstract

The goal of my project is to develop experimental proposals aiming to collect evidence that quantum effects, such as quantum superposition and entanglement hold at large scales. This includes proposals for light-atom interfaces to demonstrate that entanglement can survive over hundreds of kilometers through quantum networks, photonic experiments aiming to bring quantum effects to the domain where they can be observed by the human eyes, light-mechanical interfaces to demonstrate that entanglement applies to massive macroscopic systems. Behind their fundamental interest to gain insight into the reasons that makes it hard to observe quantum effects at macroscopic scales, our research have important applications for long distance quantum communications and quantum metrology.
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