Current fellows

Contact us

Contact us


Jean-Marc Berroir
Labex Director
directeur@phys.ens.fr

Sarah Reemers
Administrative manager of the Labex
sarah.reemers@phys.ens.fr

Junior Research Chairs

The LabEx appoints two new JRC holders each year. To find out more about the selection process and the schedule please visit our JRC pages

Master in Fundamental Physics

Online applications until March 1, 2020 for entry in year 1, until May 1, 2020 for entry in year 2.
[www.https:applicationicfp.phys.ens.fr/form.php.en]

Contact :
applicationicfp@phys.ens.fr

End of 2019, Raphaël, Valentina and Achilleas joined the team.


Raphaël Jeanneret (2019-)
Raphaël is an experimental physicist mainly working on micro-organismal systems (micro-algae, bacteria, etc). His research focuses on active and out-of-equilibrium systems and the biology and ecology of microbes.

He has become fascinated by the way life works at the micro-metric scale, thanks to his postdoctoral experiences in England at the University of Warwick (group of Marco Polin and Vasily Kantsler), and in Spain at the Mediterranean Institute for Advanced Studies (IMEDEA, group of Idan Tuval). Prior to that he obtained his PhD at ESPCI, working with Denis Bartolo on the self-organization of confined micro-emulsions under low Reynolds number flows.

Selected Publications
- R. Jeanneret, D.O. Pushkin and M. Polin, Confinement enhances the diversity of microbial flow fields, Phys. Rev. Lett. 123, 248102 (2019)
- J. Font-Muñoz*, R. Jeanneret*, J. Arrieta, S. Anglès, A. Jordi, I. Tuval and G. Basterretxea, Collective sinking promotes selective cell pairing in planktonic pennate diatoms, Proc. Nat. Acad. Sci. USA 116, 15997-16002 (2019)
- R. Jeanneret, D. O. Pushkin, V. Kantsler, and M. Polin, Entrainment dominates the interaction of microalgae with micron-sized objects, Nat. Commun. 7, 12518 (2016)
- R. Jeanneret, and D. Bartolo, Geometrically-protected reversibility in hydrodynamic Loschmidt-echo experiment, Nat. Commun. 5, 3474 (2014)

Full list available : https://raphjeanneret.wordpress.com/publications/
More information : https://raphjeanneret.wordpress.com


Achilleas Passias (2019-)
Achilleas is a theoretical physicist, whose research focuses on the duality between strongly coupled quantum field theories and theories of gravity.

He obtained his Ph.D. from King’s College London, and has conducted research at the University of Milano-Bicocca and Uppsala University.

Selected Publications
- Holographic duals of five-dimensional SCFTs on a Riemann surface, J. High Energy Phys. 1901 (2019) 058 ; with I. Bah and P. Weck
- Holographic microstate counting for AdS$_4$ black holes in massive IIA supergravity, J. High Energy Phys. 1710 (2017) 190 ; with S. M. Hosseini and K. Hristov
- Universal consistent truncation for 6d/7d gauge/gravity duals, J. High Energy Phys. 1510 (2015) 187 ; with A. Rota and A. Tomasiello
- The supersymmetric NUTs and bolts of holography, Nucl. Phys. B 876 (2013) 810-870 ; with D. Martelli and J. Sparks

More information : https://inspirehep.net/authors/1263931

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Valentina Ros (2019-)
Valentina obtained her Ph.D in Statistical Physics at the International School for Advanced Studies (SISSA) in Trieste. Before joining ENS, she has been a postdoctoral researcher at the Institute of Theoretical Physics of CEA in Saclay, where she worked in collaboration with G. Biroli.

In 2019 she was awarded the Statistical and Nonlinear Physics Early Career Prize of the European Physical Society.

She is interested in quantum and classical disordered systems, ergodicity breaking and out-of-equilibrium dynamics. Her research activity focuses on quantum localization phenomena, high-dimensional random landscapes and glassy systems.

Selected Publications
- Distribution of rare saddles in the p-spin energy landscape, Journal of Physics A : Mathematical and Theoretical 53, 125002 (2020).
- Complex energy landscapes in spiked-tensor and simple glassy models : ruggedness, arrangements of local minima and phase transitions, with G. Ben Arous, G. Biroli and C. Cammarota, Physical Review X 9, 011003 (2019).
- Remanent magnetization : signature of Many-Body Localization, with M. Mueller, Physical Review Letters 118, 237202 (2017).
- Integrals of motion in the Many-Body Localized phase, with M. Mueller and A. Scardicchio, Nuclear Physics B 891, 420 (2015).

More information : https://scholar.google.it/citations?user=9809-1wAAAAJ&hl=it

The other chair holders are, by year of arrival :

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Yashar Akrami (2018-2020)
(PhD : Oskar Klein Center, Stockholm ; Postdocs : Leiden University, Heidelberg University, University of Oslo).
Yashar is a theoretical physicist specialised in cosmology and particle physics, with a broad range of interests. He has also a strong interest in cosmological data analysis and his focus is on the interplay between cosmological observations and fundamental physics.

Yashar is interested in questions related to the physics of the early universe and cosmic initial conditions, late-time cosmic acceleration and dark energy, theories of gravity on the largest scales, signatures of new physics beyond standard models of cosmology and particle physics, and implications of high energy theories (quantum gravity, string theory, supergravity) for cosmology.

On the observational side, he is interested in the cosmic microwave background, large-scale structure of the universe, and statistical inference and high-performance computing techniques in cosmology and particle physics. He is an active member of the Planck Collaboration, Euclid Consortium, and the Square Kilometre Array (SKA).

Selected publications :
- SKA Collaboration (2018) : Cosmology with Phase 1 of the Square Kilometre Array : Red Book 2018 : Technical specifications and performance forecasts. Submitted to Publ. Astron. Soc. Austral. [arXiv:1811.02743].
- Akrami Y., Kallosh R., Linde A., Vardanyan V. (2018) : The landscape, the swampland and the era of precision cosmology. Fortsch. Phys. (2018) 1800075. [arXiv:1808.09440].
- Planck Collaboration (Akrami Y. et al.) : Planck 2018 results. X. Constraints on infation. Submitted to Astronomy & Astrophysics (A&A). [arXiv:1807.06211].
- Akrami Y., Brax P., Davis A. C., Vardanyan V. (2018) : Neutron star merger GW170817 strongly constrains doubly coupled bigravity. Phys. Rev. D97 (2018) 124010. [arXiv:1803.09726].
- Akrami Y., Kallosh R., Linde A., Vardanyan V. (2017) : Dark energy, α-attractors, and large-scale structure surveys. JCAP 1806 (2018) 041. [arXiv:1712.09693].

Full list : https://inspirehep.net/author/profile/Y.Akrami.2
More information : https://www.yashar-akrami.com/

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Andrei Lazanu (2018-2020)
After completing the Mathematical Tripos at the University of Cambridge, Gonville and Caius College (BA & MMath), Andrei pursued a PhD in theoretical physics at DAMTP, University of Cambridge under the supervision of Prof. P. Shellard, studying the effects of topological defects on the Cosmic Microwave Background and the inflationary bispectrum of the large-scale structure of the Universe. Afterwards, he has been an InDark postdoctoral fellow at INFN, Padua, Italy, focussing on the analytical modelling of the matter bispectrum of large scale structure and on obtaining forecasts for primordial non-Gaussianity.

At ENS, he develops analytical and numerical techniques to model the galaxy bispectrum in order to place stringent constraints on cosmological parameters. These involve both work to model the matter bispectrum towards the nonlinear regime, as well as accurate large-scale studies for the galaxy bispectrum. Part of the work is being pursued in the framework of the Euclid Consortium. He also studies models of dark energy and modified gravity, and in particular he focuses on employing three-point correlation functions to constrain parameters of these models.

Selected publications
- The two and three-loop matter bispectrum in perturbation theories, A. Lazanu, M. Liguori, JCAP 1804 (2018) no.04, 055
- Constraining primordial non-Gaussianity with bispectrum and power spectrum from upcoming optical and radio surveys, D. Karagiannis, A. Lazanu, M. Liguori, A. Raccanelli, N. Bartolo, L. Verde, Mon.Not.Roy.Astron.Soc. 478 (2018) no.1, 1341-1376
- Matter bispectrum of large-scale structure : Three-dimensional comparison between theoretical models and numerical simulations, A. Lazanu, T. Giannantonio, M. Schmittfull, E.P.S. Shellard, Phys.Rev. D93 (2016) no.8, 083517
- Contribution of domain wall networks to the CMB power spectrum, A. Lazanu, C.J.A.P. Martins, E.P.S. Shellard, Phys.Lett. B747 (2015) 426-432

More information : https://scholar.google.com/citations?user=UNWdrKYAAAAJ&hl=en

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Stéphane Perrard (2018-2020)
Stéphane is an experimental physicist in non linear Physics and fluid dynamics. After his undergraduate and master studies at Ecole normale supérieure of Paris & Lyon, he did his PhD with Y. Couder and E. Fort at university Paris-Diderot. During his PhD he studied experimentally the dynamics of a pilot-wave system formed by a drop bouncing on a liquid surface and the waves it generates. In 2015, he joined the James Franck Institute at the University of Chicago as a postdoctoral scholar with Pr. W. Irvine. For two years, he had designed experiments to study hydrodynamics turbulence in inhomogeneous and un-stationnary situations. In summer 2017, he started a long term collaboration with Pr L. Deike at Princeton University on turbulent two phase flows and their application to ocean-atmosphere exchanges. In 2017-2018, he got a joined appointment between University Paris-Sud and Ecole Polytechnique where he studied theoretically the generation of waves by the wind.

As a junior research chair holder, his current work focuses on fundamental aspects of large scale in turbulent flows, interface-turbulence interactions and pilot-wave systems.

More information : https://scholar.google.fr/citations?user=drKqDrUAAAAJ&hl=fr


JPEGManuel Gessner (2018-2020)
Manuel is a theorist working in the fields of quantum information and quantum metrology with applications especially with cold atoms, trapped ions and photonic systems. He obtained his Diploma and PhD from the University of Freiburg, Germany. There he worked on correlations in open quantum systems and developed methods for the characterization of many-body quantum systems in the groups of H.-B. Breuer and A. Buchleitner. From 2012-2013 he visited the University of California, Berkeley as part of his PhD studies, where he worked in the experimental group of H. Häffner on trapped ions. From 2015-2018, Manuel joined A. Smerzi’s theory group at LENS in Florence, Italy, as a postdoc, working mostly on interferometry, quantum correlations and Bose-Einstein condensates.

At ENS, Manuel’s research focuses on quantum metrology and quantum correlations with multi-mode systems, in particular the characterization of multipartite entanglement and the generation of highly sensitive states for precision measurements. He collaborates closely with experiments at LKB on cold atoms and quantum optics.

Selected publications
- M. Gessner, A. Smerzi et L. Pezzè, Multiparameter squeezing for optimal quantum enhancements in sensor networks, to be published in Nature Communications (2020).
- M. Gessner, A. Smerzi, and L. Pezzè, Metrological Nonlinear Squeezing Parameter, Physical Review Letters 122, 090503 (2019).
- M. Gessner, L. Pezzè and A. Smerzi, Sensitivity bounds for multiparameter quantum metrology, Physical Review Letters 121, 130503 (2018).
- E. G. Carnio, A. Buchleitner, and M. Gessner, Robust asymptotic entanglement under multipartite collective dephasing. Physical Review Letters 115, 010404 (2015).
- M. Gessner, M. Ramm, T. Pruttivarasin, A. Buchleitner, H.-P. Breuer, and H. Häffner, Local Detection of Quantum Correlations with a Single Trapped Ion, Nature Physics 10, 105 (2014).

More information : https://sites.google.com/view/qinfo/home

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Julian Struck (2017-2020)
Julian received his PhD in 2013 under the supervision of Prof. Dr. K. Sengstock (University of Hamburg), working on bosonic quantum gases, in artificial gauge fields and driven optical lattices. In 2014 he joined the group of Prof. Dr. Martin Zwierlein at the Massachusetts Institute of Technology (MIT). His postgraduate research in the field of strongly interacting, ultracold Fermi gases focused on Fermi Liquid behavior, hydrodynamics, phonon decay and short-range correlations.

Currently he studies strongly interacting Fermi gases in 1D and in the 3D to 1D crossover.

Selected publications
- Z. Yan, P. B. Patel, B. Mukherjee, R. J. Fletcher, J. Struck and M. W. Zwierlein. Boiling a Unitary Fermi Liquid.
arXiv:1811.00481 (2018).
- B. Mukherjee, Z. Yan, P. B. Patel, Z. Hadzibabic, T. Yefsah, J. Struck and M. W. Zwierlein. Homogeneous Atomic Fermi Gases. Physical Review Letters 118:123401 (2017).
- J. Struck, M. Weinberg, C. Ölschläger, P. Windpassinger, J. Simonet, K. Sengstock, R. Höppner, P. Hauke, A. Eckardt, M. Lewenstein and L. Mathey. Engineering Ising-XY spin-models in a triangular lattice using tunable artificial gauge fields. Nature Physics 9:738–743 (2013).
- J. Struck, C. Ölschläger, M. Weinberg, P. Hauke, J. Simonet, A. Eckardt, M. Lewenstein, K. Sengstock and P. Windpassinger. Tunable Gauge Potential for Neutral and Spinless Particles in Driven Optical Lattices. Physical Review Letters 108:225304 (2012).
- J. Struck, C. Olschlager, R. Le Targat, P. Soltan-Panahi, A. Eckardt, M. Lewenstein, P. Windpassinger and K. Sengstock. Quantum Simulation of Frustrated Classical Magnetism in Triangular Optical Lattices. Science 333:996–999 (2011).

More information : http://www.lkb.upmc.fr/ultracoldfermigases/julian-struck/

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Fedor Levkovich-Maslyuk (2017-2020)
Fedor graduated from Moscow State University, and obtained his PhD from King’s College London. He moved on to a postdoc at the Nordita Institute in Stockholm before joining ENS.

His research focuses on understanding the dynamics of strongly interacting quantum field theories. In particular, he is exploring integrable gauge theories where one can obtain exact results unreachable by standard methods. This also sheds new light on the relation between gauge and string theories, at the same time revealing deep underlying mathematical structures. Fedor’s work has contributed to the understanding of the exact spectrum in several 3d and 4d models, such as N=4 super Yang-Mills theory which in some limits gives new predictions for realistic models of strong nuclear forces. His current research centers on new ways of computing correlation functions in these models as well as in quantum spin chains.

Selected publications
- A. Cavaglia, N. Gromov, F. Levkovich-Maslyuk, "Quantum spectral curve and structure constants in N=4 SYM : cusps in the ladder limit", JHEP 1810 (2018) 060 [arXiv:1802.04237]
- M. Guica, F. Levkovich-Maslyuk, K. Zarembo, "Integrability in dipole-deformed N=4 super Yang–Mills", J.Phys. A50 (2017) no.39, 394001 [arXiv:1706.07957]
- N. Gromov, F. Levkovich-Maslyuk, G. Sizov, "New Construction of Eigenstates and Separation of Variables for SU(N) Quantum Spin Chains", JHEP 1709 (2017) 111 [arXiv:1610.08032]
- N. Gromov, F. Levkovich-Maslyuk, "Quark-anti-quark potential in N=4 SYM", JHEP 1612 (2016) 122 [arXiv:1601.05679]
- N. Gromov, F. Levkovich-Maslyuk, G. Sizov, "Pomeron Eigenvalue at Three Loops in N=4 Supersymmetric Yang-Mills Theory", Phys.Rev.Lett. 115 (2015) no.25, 251601 [arXiv:1507.04010]

More information : https://scholar.google.com/citations?user=-vFwZfMAAAAJ&hl=en

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Hilton Barbosa de Aguiar (2016-2020)
Hilton is an experimentalist working with nonlinear microscopy and spectroscopy of complex soft matter systems (colloidal science, interfacial phenomena, biomedical imaging). His PhD focused on using interface-specific nonlinear optical tools to unravel molecular level details of colloidal particle interfaces (EPFL/Lausanne, jointly with Max-Planck Institute/Stuttgart). His post-doc activities focused on nonlinear microscopy of biological systems (Stuttgart University, Stuttgart ; Fresnel Institut, Marseille), both as an instrument developer, or in more fundamental studies on light propagation in complex media. In general, the advanced tools he uses are label-free approaches exploiting the intrinsic vibrational response of molecular systems.

He is currently implementing a Raman microspectroscopy setup (linear and nonlinear using ultrafast laser technology). These label-free tools aim at probing soft matter systems in collaboration with LPS researchers. He is also tackling fundamental questions of light propagation in complex media jointly with LKB researchers (for biomedical imaging).

Selected publications :
- "The orientation and charge of water at the hydrophobic oil droplet–water interface".
de Aguiar, de Beer, Strader, Roke. J. Am. Chem. Soc. 132, 2122-2123 (2010)
- "Programmable single-pixel-based broadband stimulated Raman scattering".
Berto, Scotte, Galland, Rigneault, de Aguiar. Opt. Lett. 42, 1696-1699 (2017)
- "Enhanced nonlinear imaging through scattering media using transmission-matrix-based wave-front shaping".
de Aguiar, Gigan, Brasselet, Phys. Rev. A 94, 043830 (2016)
- "Detection of buried microstructures by nonlinear light scattering spectroscopy"
De Beer, De Aguiar, Nijsen, Roke, Phys. Rev. Lett. 102, 095502 (2009)

More information : https://hiltonbarbosa.wixsite.com/deaguiar

Contact us


Jean-Marc Berroir
Labex Director
directeur@phys.ens.fr

Sarah Reemers
Administrative manager of the Labex
sarah.reemers@phys.ens.fr

Junior Research Chairs

The LabEx appoints two new JRC holders each year. To find out more about the selection process and the schedule please visit our JRC pages

Master in Fundamental Physics

Online applications until March 1, 2020 for entry in year 1, until May 1, 2020 for entry in year 2.
[www.https:applicationicfp.phys.ens.fr/form.php.en]

Contact :
applicationicfp@phys.ens.fr