Laboratoire de Physique Théorique
Toulouse - UMR 5152

Contact : fabien.alet@cnrs.fr

Address : Laboratoire de Physique Théorique
Université Paul Sabatier
118 Route de Narbonne
31062 Toulouse Cedex 4
France

Office : 203 (2nd floor) Bâtiment 3R1B4

Phone : +33 (0)5 61 55 68 69

Fax : +33 (0)5 61 55 60 65

Research activity

My research interests are centered within condensed matter theory & statistical mechanics, in particular in the area of strongly correlated systems. A few research themes :

 Quantum physics
 Condensed Matter Theory, Quantum magnetism, Superconductors, Cold atoms
 Many-body localization, out of equilibrium quantum physics
 Neural networks & quantum physics
 Statistical mechanics & constrained models
 High-performance computational physics, numerical techniques
 Relation to quantum information theory
 Participation to open-source projects and softwares : ALPS project (quantum Monte Carlo code SSE), Shift-invert Many Body Localization, NetKet

Work with me

NEW POSITION RE-OPENED
 2024-25 : Postdoc position on Many-Body Localization and related quantum out-of-equilibrium phenomena. Contact me

NEW
 2025 : PhD topics available on Neural quantum states in quantum many-body physics and Many-Body Localization. To be precise, I have unfortunately no funding for a PhD position, but if a student obtains independent funding (CDSN, CDSX, International funding etc), there are many problems to explore in these areas ! These topics involve (some) development of new numerical methods, so students with a computational heart are strongly encouraged to contact me if they are interested to know more. Funded M2 internships are also possible, but I would prefer to reserve internships in case a PhD is possible afterwards.

Publications

 Full publication list

 Links to publications databasis Arxiv, Citation data basis : Researcher ID A-4147-2011 (published work), Orcid (published work and review work), ADS (including preprints), Google Scholar (including preprints)

Some recent publications

 Phase transitions and remnants of fractionalization at finite temperature in the triangular lattice quantum loop model , Xiaoxue Ran, Sylvain Capponi, Junchen Rong, Fabien Alet, Zi Yang Meng, arXiv:2412.01503

 Statistics of systemwide correlations in the random-field XXZ chain:Importance of rare events in the many-body localized phase, Jeanne Colbois, Fabien Alet, Nicolas Laflorencie, arXiv:2410.10325

 Interaction-Driven Instabilities in the Random-Field XXZ Chain, Jeanne Colbois, Fabien Alet, Nicolas Laflorencie, Phys. Rev. Lett. 133, 116502 (2024), arXiv:2403.09608

 Ergodic and non-ergodic properties of disordered SU(3) chains, Bhupen Dabholkar, Fabien Alet, arXiv:2403.0442

 Noncoplanar and chiral spin states on the way towards Néel ordering in fullerene Heisenberg models, Attila Szabó, Sylvain Capponi, Fabien Alet, Phys. Rev. B 109, 054410 (2024), arXiv:2311.01496

 Classical fully-packed loop model with attractive interactions on the square lattice, Bhupen Dabholkar, Xiaoxue Ran, Junchen Rong, Zheng Yan, G. J. Sreejith, Zi Yang Meng, Fabien Alet, Phys. Rev. B 108, 125112 (2023), arXiv:2305.06458

 Anomalous relaxation of density waves in a ring-exchange system, Pranay Patil, Markus Heyl, Fabien Alet, Phys. Rev. E 107, 034119 (2023), arXiv:2211.16788

 Re-entrance effect in the high-temperature critical phase of the quantum dimer model on the square lattice, Bhupen Dabholkar, G.J. Sreejith, Fabien Alet, Phys. Rev. B 106, 205121 (2022), arXiv:2207.03301

 Weakly first-order quantum phase transition between Spin Nematic and Valence Bond Crystal Order in a square lattice SU(4) fermionic model, Pranay Patil, Fabien Alet, Sylvain Capponi, Matthieu Mambrini, Phys. Rev. B 105, L140403 (2022), arXiv:2109.10042

 Probing symmetries of quantum many-body systems through gap ratio statistics, Olivier Giraud, Nicolas Macé, Eric Vernier, Fabien Alet, Phys. Rev. X 12, 011006 (2022) arXiv:2008.11173

Recent Invited Talks

 Interaction-Driven Instabilities in the Random-Field XXZ Chain, Cefipra workshop « Topology and Entanglement in Quantum Matter », Toulouse, June 2024 slides

 Re-entrance effect in the finite-temperature phase diagram of the quantum dimer model on the square lattice, Workshop Tensor Networks for Constrained Systems (program), Delft, October 2023, slides

 Numerical simulations of MBL models, School on Quantum localization and Glassy physics, Cargese, July 2023, slides, references, tutorials, lecture notes

 Many-body localization and its computational aspects, CECAM Workshop New Frontiers for Simulating Nonequilibrium Many Body Systems in Physics and Chemistry : An Interdisciplinary Response, Paris, June 2023 slides, references

 Two topics on disordered many-body quantum systems, MBL symposium, Ljubljana, June 2023, slides

 3 lectures on Many-Body Localization, Hong Kong Computational and Theoretical Physics Study Group 2023, March 2023, poster, slides, references, tutorials

Funded Projects

• 2023- : Subvention Scientifique Fondation del Duca
• 2023-27 : ANR International AUTOMATE (participant)
• 2022-206 : ANR QMAHT (participant)
• 2019-22 : CNRS-IISER Pune Project (PI)
• 2018-23 : ANR LINK (participant)
• 2017-19 : European Project PRACE (PI)
• 2017-19 : Labex NEXT MBL-EXP (PI)
• 2016-20 : ANR THERMOLOC (co-PI)
• 2012-15 : ANR Internationale QUAPRIS (participant)
• 2011-14 : French-Indian CEFIPRA Project (PI)
• 2009-12 : ANR JCJC Q-BONDS (PI)

Professional Service

• 2022- : Deputy Director LPT
• 2019 : APS Outstanding Referee
• 2018- : EPSRC Peer review college, Full college Member
• 2014-15 : Ecole Sciences Doctorale de la Matière, Université Toulouse, Board Member
• 2008-12 : Comite National CNRS, Section 06 (now Section 03), Member
• 2012- : Commission Régionale Formation Permanente, CNRS
• Recruitment Juries : CNRS (CR-DR, 2009-12), Assistant Professor/Full Professor (5/1 since 2011)
• PhD, HDR Juries : 12 since 2009
• Reviewer / Panel Member : Funding agencies (ERC, NSF, DOE, UKRI, Research Council Finland, DFG, Max Planck, FWO, NCN, MIUR, ANR, etc), Journals (many !)

Supervision

• Postdoctoral researchers : Asmi Haldar (Marie Skłodowska-Curie Postdoc fellowship, 2023-) , Pranay Patil (2020-21, now postdoc Okinawa Institute of Science and Technology), Francesca Pietracaprina (2018-19, now at Algorithmiq), Nicolas Macé (2017-19, now Center on Long-Term Risk), David Luitz (2013-15, now Professor, University of Bonn), Sumiran Pujari (2011-14, now associate professor IIT Bombay), David Schwandt (2011-12, now in industry), Fabricio Albuquerque (2009-11, now assistant professor, Univ. Viçosa, Brazil)

• PhD Students : Aditya Chincholi (2023-), Bhupen Dabholkar (2021-), Hugo Théveniaut (2017-2020, now postdoc), Helder Casa Grande (visiting PhD, 2012-13), David Schwandt (2008-11, now in industry)

Mini-Cv

• Since Oct. 2018 : Directeur de Recherche CNRS, Laboratoire de Physique Théorique, Université Paul Sabatier Toulouse

• 2016 : Habilitation à diriger les recherches [theses-en-ligne]

• Oct. 2005 - Sep 2018 : Chargé de Recherche CNRS, Laboratoire de Physique Théorique, Université Paul Sabatier Toulouse

• Oct. 2004 - Sep. 2005 : Postdoc, Service de Physique Théorique, CEA Saclay, Supervisor : Dr. Grégoire Misguich

• Oct. 2002 - Sep. 2004 : Postdoc, Institute of Theoretical Physics, ETH Zürich, Supervisor : Pr. Matthias Troyer

• Oct. 1999 - Sep. 2002 : PhD in Theoretical Physics, Groupe de Physique Théorique, Laboratoire de Physique Quantique, Université Paul Sabatier Toulouse, PhD advisor : Pr. Erik Sørensen, PhD Thesis [theses-en-ligne]