Antonio and Thomas joined the team end of 2020.
Antonio Costa (2020-2022)
Antonio Carlos Borges Santos da Costa joins our JRC team for his first postdoctoral position.
Antonio obtained his PhD in 2020 under the supervision of Greg Stephens at Vrije Universiteit Amsterdam (Netherlands). He worked on the physics of animal movement behaviour, studying organism scale movements. He uses physics inspired approaches from statistical mechanics and dynamical systems theory, as well as information theory and statistical inference.
He collaborates with the theoretical neuroscience and biophysics team members :
WormPose : Image synthesis and convolutional networks for pose estimation in C. elegans, Hebert, Ahamed, Costa, O’Shaugnessy, Stephens. (preprint) 2020
Tosif Ahamed, Antonio Carlos Costa, Greg Stephens, Capturing the Continuous Complexity of Behaviour in C. elegans, Nature Physics Oct. 2020
Stephen Helms*, Mathijs Rozemuller*, Antonio Carlos Costa*, Leon Avery, Greg Stephens, Thomas Shimizu, Modelling the ballistic-to-diffusive transition in nematode motility variation in exploratory behaviour across species, J. Royal Soc. Interface, Aug. 2019
Antonio Carlos Costa, Tosif Ahamed, Greg Stephens, Adaptive locally-linear models of complex dynamics, PNAS, Jan. 2019
More information : https://antonioccosta.github.io/
Thomas Boulier (2020-2022)
Thomas received his PhD at ENS Laboratoire Kastler Brossel (Paris) in 2014. He has since occupied international postdoctoral positions, including at the Joint Quantum Institute (USA), at ETHZ in Zurich (Switzerland) and at LCF in Palaiseau (France).
Thomas is an experimental quantum physicist interested in many subjects within quantum optics, condensed matter and AMO physics, with a special interest in Rydberg physics.
His research activities focus on exploring systems of many bosonic particles in strong interaction, and on optically exploiting them to give interactions to photons. He has been working with two types of systems : exciton-polaritons in semiconductors and ultra-cold Rydberg atoms in optical lattices. Thomas’ JRC project aims at combining ideas from both communities to explore Rydberg physics in condensed matter.
Thomas has joined Nano-THZ team, collaborating with Sukhdeep Dhillon.
T. Boulier, J Maslek, M Bukov, C Bracamontes, E Magnan, S Lellouch, E Demler, N Goldman, JV Porto, Phys. Rev. X 9 (1), 011047 (2019).
E. A. Goldschmidt, T. Boulier, R. C. Brown, S. B. Koller, J. Young, A. V. Gorshkov, S. L. Rolston and J. V. Porto, Physical Review Letters 116, 113001 (2016).
T. Boulier, E. Cancellieri, N. D. Sangouard, Q. Glorieux, A. V. Kavokin, D. M. Whittaker, E. Giacobino and A. Bramati, Physical Review Letters 116, 116402 (2016).
T. Boulier, M. Bamba, A. Amo, C. Adrados, A. Lemaitre, E. Galopin, I. Sagnes, J.Bloch, C. Ciuti, E. Giacobino and A. Bramati, Nature Communications 5, 3260, (2014).
More information : https://tboulier.github.io/
The other chair holders are, by year of arrival :
Raphaël Jeanneret (2019-2021)
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.
M. Rieu, T. Vieille, G. Radou, R. Jeanneret, N. Ruiz-Gutierrez, B. Ducos, J.-F. Allemand, and V. Croquette, Parallel, linear, and subnanometric 3D-tracking of microparticles with Stereo Darkfield Interferometry, Sci. Adv, in press (2021)
J. Font-Munoz∗, R. Jeanneret∗, J. Arrieta, S. Angl`es, 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 and M. Polin, Confinement enhances the diversity of microbial flow fields, Phys. Rev. Lett. 123, 248102 (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)
Achilleas Passias (2019-2021)
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.
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
Yashar Akrami (2018-2021)
(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).
Akrami, Casas, Deng, Vardanyan : Quintessential α-attractor inflation : forecasts for Stage IV galaxy surveys (2020)
Chartier, Wandelt, Akrami, Villaescusa-Navarro : CARPool : fast, accurate computation of large-scale structure statistics by pairing costly and cheap cosmological simulations (2020)
Akrami et al. : Planck intermediate results. LV. Reliability and thermal properties of high-frequency sources in the Second Planck Catalogue of Compact Sources (Planck Collaboration, 2020)
Akrami, Sasaki, Solomon, Vardanyan : Multi-field dark energy : cosmic acceleration on a steep potential (2020)
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].
Andrei Lazanu (2018-2021)
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.
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
Stéphane Perrard (2018-2022)
Stéphane is an experimental physicist in non linear Physics and fluid dynamics. After his studies at Ecole normale supérieure of Paris & Lyon, he did his PhD with Y. Couder and E. Fort at university Paris-Diderot, studying 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 (University of Chicago) and Pr. W. Irvine, studying hydrodynamics turbulence in inhomogeneous and un-stationnary situations. He started his collaboration with Pr L. Deike at Princeton University in 2017, on turbulent two phase flows and their application to ocean-atmosphere exchanges. In 2017-2018, through a joined position between University Paris-Sud and Ecole Polytechnique he studied generation of waves by the wind.
His current work focuses on fundamental aspects of large scale in turbulent flows, interface-turbulence interactions and pilot-wave systems.
Creation of an isolated turbulent blob sustained by vortex ring injection, T Matsuzawa, N Mitchell, S Perrard, Bulletin of the American Physical Society (2021)
Effect of a weak current on wind-generated waves in the wrinkle regime, C Nové-Josserand, S Perrard, A Lozano-Durán, M Benzaquen, ..., Physical Review Fluids 5 (12), 124801 (2020)
Bubble deformation by a turbulent flow, S Perrard, A Rivière, W Mostert, L Deike, arXiv preprint arXiv:2011.10548 (2020)
Surface waves along liquid cylinders. Part 1. Stabilising effect of gravity on the Plateau–Rayleigh instability, CT Pham, S Perrard, G Le Doudic, Journal of Fluid Mechanics 891 (2020)
Wind Wave Generation : Turbulent Windprint below the Wave Onset and its Link with OM Phillips 1957 Theory, S Perrard, C Nové-Josserand, A Lozano-Duran, M Rabaud, ..., Ocean Sciences Meeting (2020)
More information : https://scholar.google.fr/citations?user=drKqDrUAAAAJ&hl=fr
Manuel Gessner (2018-2021)
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.
B. Yadin, M. Fadel, and M. Gessner, Metrological complementarity reveals the Einstein-Podolsky-Rosen paradox, Nature Communications 12, 2410 (2021).
Z. Ren, W. Li, A. Smerzi, and M. Gessner, Metrological Detection of Multipartite Entanglement from Young Diagrams, Physical Review Letters 126, 080502 (2021).
M. Gessner, C. Fabre, N. Treps, Superresolution limits from measurement crosstalk, Physical Review Letters 125, 100501 (2020).
M. Gessner, A. Smerzi, and L. Pezzè, Multiparameter squeezing for optimal quantum enhancements in sensor networks, Nature Communications 11, 3817 (2020).
M. Gessner, A. Smerzi, and L. Pezzè, Metrological Nonlinear Squeezing Parameter, Physical Review Letters 122, 090503 (2019).
Julian Struck (2017-2021)
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.
P. B. Patel, Z. Yan, B. Mukherjee, R. J. Fletcher, J. Struck and M. W. Zwierlein. Universal sound diffusion in a strongly interacting Fermi gas. Science 370:1222-1226 (2020)
Z. Yan, P. B. Patel, B. Mukherjee, R. J. Fletcher, J. Struck and M. W. Zwierlein. Boiling a Unitary Fermi Liquid. Physical Review Letters 122:093401 (2019)
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).