Michel Fruchart

I am a CNRS researcher at Gulliver in ESPCI and PSL University. My research interests center on soft and hard condensed matter physics, including agentic matter, nonlinear dynamics, statistical physics, and hydrodynamics. Recent works focus on the effect of non-reciprocity on many-body systems, ranging from phase transitions to turbulence.

E-mail: michel (dot) fruchart (at) espci (dot) fr
Address: Gulliver UMR CNRS 7083, ESPCI Paris, 10 rue Vauquelin, 75231 Paris cedex 05, France
Office: room C130

Publications

  1. Spontaneous brain-wide rotational dynamics constrain cue-evoked behavior, Sihan Chen, Yunlong Xu, Doruk Efe Gökmen, Michel Fruchart, Brent Doiron, Vincenzo Vitelli, preprint, arXiv:2610.25061
  2. Hall conductance of dilute electrolytes from odd stochastic density functional theory, Yael Avni, Michel Fruchart, David Martin, Tali Khain, Vincenzo Vitelli, preprint, arXiv:2609.33797
  3. Odd stochastic density functional theory, Yael Avni, Michel Fruchart, David Martin, Tali Khain, Vincenzo Vitelli, preprint, arXiv:2609.32080
  4. Inertial Asynchronous Computation, Doruk Efe Gökmen, Michel Fruchart, Dmitrii Zendrikov, Giacomo Indiveri, Giulio Biroli, Vincenzo Vitelli, preprint, arXiv:2607.21965
  5. Nonreciprocal many-body physics, Michel Fruchart, Vincenzo Vitelli, preprint, arXiv:2602.11111
  6. Symmetry-driven artificial phononic media, Simon Yves, Michel Fruchart, Romain Fleury, Gal Shmuel, Vincenzo Vitelli, Michael R. Haberman, Andrea Alù, Nature Reviews Materials (2025), arXiv:2411.18556
  7. Measurement-Induced Phase Transitions in Informational Active Matter, Bryan VanSaders, Michel Fruchart, Vincenzo Vitelli, PNAS Nexus 5, pgag077 (2026), arXiv:2302.07402
  8. Information bounds the robustness of self-organized systems, Nicolas Romeo, David G. Martin, Mattia Scandolo, Michel Fruchart, Edwin M. Munro, Vincenzo Vitelli, preprint, arXiv:2511.01682
  9. Learning noisy tissue dynamics across time scales, Ming Han, John Devany, Michel Fruchart, Margaret L. Gardel, Vincenzo Vitelli, preprint, arXiv:2510.19090
  10. When is nonreciprocity relevant?, Giulia Garcia Lorenzana, David Martin, Yael Avni, Daniel S. Seara, Michel Fruchart, Giulio Biroli, Vincenzo Vitelli, preprint, arXiv:2509.17972
  11. Hydrodynamic description of collisional odd fluids from kinetic theory, Ege Eren, Michel Fruchart, Vincenzo Vitelli, Phys. Rev. E 114, 024109 (2026), arXiv:2508.12944
  12. Chirality across scales in tissue dynamics, Sihan Chen, Doruk Efe Gökmen, Michel Fruchart, Miriam Krumbein, Pascal Silberzan, Victor Yashunsky, Vincenzo Vitelli, preprint, arXiv:2506.12276
  13. Wave turbulence theory of odd fluids and solids: kinetic equations and solutions, Xander M. de Wit, Léo Touzo, Sébastien Galtier, Michel Fruchart, Federico Toschi, Vincenzo Vitelli, preprint, arXiv:2606.14583
  14. Odd wave turbulence, Xander M. de Wit, Léo Touzo, Sébastien Galtier, Michel Fruchart, Federico Toschi, Vincenzo Vitelli, preprint, arXiv:2504.15403
  15. Nonreciprocally coupled spin glasses: Exceptional-point-mediated phase transitions and aging, Giulia Garcia Lorenzana, Ada Altieri, Giulio Biroli, Michel Fruchart, Vincenzo Vitelli, Physical Review E 112, 044154 (2025)
  16. Non-reciprocal spin-glass transition and aging, Giulia Garcia Lorenzana, Ada Altieri, Giulio Biroli, Michel Fruchart, Vincenzo Vitelli, Physical Review Letters 135, 187402 (2025), arXiv:2408.17360
  17. Learning dynamical behaviors in physical systems, Rituparno Mandal, Rosalind Huang, Michel Fruchart, Pepijn G. Moerman, Suriyanarayanan Vaikuntanathan, Arvind Murugan, Vincenzo Vitelli, preprint, arXiv:2406.07856
  18. Odd viscosity suppresses intermittency in direct turbulent cascades, Sihan Chen, Xander M. de Wit, Michel Fruchart, Federico Toschi, Vincenzo Vitelli, Physical Review Letters 133, 144002 (2024), arXiv:2404.18894
  19. Dynamical phase transitions in the nonreciprocal Ising model, Yael Avni, Michel Fruchart, David Martin, Daniel Seara, Vincenzo Vitelli, Phys. Rev. E 111, 034124 (2025), arXiv:2409.07481
  20. Sociohydrodynamics: Data-driven modeling of social behavior, Daniel S. Seara, Jonathan Colen, Michel Fruchart, Yael Avni, David Martin, Vincenzo Vitelli, PNAS 122 (2025), arXiv:2312.17627
  21. Learning a conserved mechanism for early neuroectoderm morphogenesis, Matthew F. Lefebvre, Jonathan Colen, Nikolas H. Claussen, Fridtjof Brauns, Marion K. Raich, Noah Mitchell, Michel Fruchart, Vincenzo Vitelli, Sebastian J. Streichan, preprint, bioRxiv:10.1101/2023.12.22.573058
  22. Information theory for dimensionality reduction in dynamical systems, Matthew S. Schmitt, Maciej Koch-Janusz, Michel Fruchart, Daniel S. Seara, Vincenzo Vitelli, preprint, arXiv:2312.06608
  23. Nonreciprocal Ising model, Yael Avni, Michel Fruchart, David Martin, Daniel Seara, Vincenzo Vitelli, Phys. Rev. Lett. 134, 117103 (2025), arXiv:2311.05471
  24. Trading particle shape with fluid symmetry: on the mobility matrix in 3D chiral fluids, Tali Khain, Michel Fruchart, Colin Scheibner, Thomas A. Witten, Vincenzo Vitelli, Journal of Fluid Mechanics 992 (2024), arXiv:2310.17528
  25. Transition to Collective Motion in Nonreciprocal Active Matter: Coarse Graining Agent-Based Models into Fluctuating Hydrodynamics, David Martin, Daniel Seara, Yael Avni, Michel Fruchart, Vincenzo Vitelli, Physical Review X 15, 041015 (2025), arXiv:2307.08251
  26. Viscous tweezers: controlling particles with viscosity, Tali Khain, Michel Fruchart, Vincenzo Vitelli, Physical Review Research 6, L042039 (2024), arXiv:2307.04948
  27. Pattern formation by turbulent cascades, Xander M. de Wit, Michel Fruchart, Tali Khain, Federico Toschi, Vincenzo Vitelli, Nature 627, 515–521 (2024), arXiv:2304.10444
  28. Odd Viscosity and Odd Elasticity, Michel Fruchart, Colin Scheibner, Vincenzo Vitelli, Annual Review of Condensed Matter Physics 14, 471-510 (2023), arXiv:2207.00071
  29. Soft Metamaterials: Adaptation and Intelligence, Colin Scheibner, Michel Fruchart, Vincenzo Vitelli, in Soft matter roadmap, J.-L. Barrat et al. Journal of Physics: Materials 7, 012501 (2023), arXiv:2205.01867
  30. Odd elasticity and topological waves in active surfaces, Michele Fossati, Colin Scheibner, Michel Fruchart, Vincenzo Vitelli, Phys. Rev. E 109, 024608 (2024), arXiv:2210.03669
  31. Exceptional points in nonlinear and stochastic dynamics, Cheyne Weis, Michel Fruchart, Ryo Hanai, Kyle Kawagoe, Peter B. Littlewood, Vincenzo Vitelli, Phys. Rev. Research 7, 043157 (2025) arXiv:2207.11667
  32. The odd ideal gas: Hall viscosity and thermal conductivity from non-Hermitian kinetic theory, Michel Fruchart, Ming Han, Colin Scheibner, Vincenzo Vitelli, preprint, arXiv:2202.02037
  33. Internal wave crystals, Sasan J. Ghaemsaidi, Michel Fruchart, Severine Atis, preprint, arXiv:2111.07984
  34. Systematic generation of Hamiltonian families with dualities, Michel Fruchart, Claudia Yao, Vincenzo Vitelli, Phys. Rev. Research 5, 023099 (2023) arXiv:2108.11138
  35. Stokes flows in three-dimensional fluids with odd and parity-violating viscosities, Tali Khain, Colin Scheibner, Michel Fruchart, Vincenzo Vitelli, Journal of Fluid Mechanics 934, A23 (2022) arXiv:2011.07681
  36. Liquid-crystal-based topological photonics, Hamed Abbaszadeh, Michel Fruchart, Wim van Saarloos, Vincenzo Vitelli, PNAS 118 (2021), arXiv:2005.02476
  37. Non-reciprocal phase transitions, Michel Fruchart, Ryo Hanai, Peter B. Littlewood, Vincenzo Vitelli, Nature 592, 363–369 (2021) arXiv:2003.13176
  38. Fluctuating hydrodynamics of chiral active fluids, Ming Han, Michel Fruchart, Colin Scheibner, Suriyanarayanan Vaikuntanathan, Juan de Pablo, Vincenzo Vitelli, Nature Physics 17, 1260–1269 (2021) arXiv:2002.07679
  39. Symmetries and dualities in the theory of elasticity, Michel Fruchart, Vincenzo Vitelli, Phys. Rev. Lett. 124, 248001 (2020), arXiv:1912.02384
  40. A mechanism for anomalous transport in chiral active liquids, Zhenghan Liao, Ming Han, Michel Fruchart, Vincenzo Vitelli, Suriyanarayanan Vaikuntanathan, J. Chem. Phys. 151, 194108 (2019), arXiv:1909.03132
  41. Computation of topological phase diagram of disordered Pb1−xSnxTe using the kernel polynomial method, Daniel Varjas, Michel Fruchart, Anton R. Akhmerov, Pablo Perez-Piskunow Phys. Rev. Research 2, 013229 (2020), arXiv:1905.02215
  42. Dualities and non-Abelian mechanics, Michel Fruchart, Yujie Zhou, Vincenzo Vitelli, Nature 577, 636–640 (2020), arXiv:1904.07436
  43. Machine learning assisted measurement of local topological invariants, Marcello D. Caio, Marco Caccin, Paul Baireuther, Timo Hyart, Michel Fruchart, preprint, arXiv:1901.03346
  44. Topological waves in fluids with odd viscosity, Anton Souslov, Kinjal Dasbiswas, Michel Fruchart, Suriyanarayanan Vaikuntanathan, Vincenzo Vitelli, Phys. Rev. Lett. 122, 128001 (2019), arXiv:1802.09649
  45. Metamaterials: The effective way, Michel Fruchart & Vincenzo Vitelli, Nature Materials 17, 292–293 (2018)
  46. Waves cornered, Michel Fruchart & Vincenzo Vitelli, Nature 555, 318--319 (2018)
  47. Soft self-assembly of Weyl materials for light and sound, Michel Fruchart, Seung-Yeol Jeon, Kahyun Hur, Vadim Cheianov, Ulrich Wiesner, Vincenzo Vitelli, PNAS 115 (2018), arXiv:1711.11019
  48. Phase rotation symmetry and the topology of oriented scattering networks, Pierre Delplace, Michel Fruchart, Clément Tauber, Phys. Rev. B 95, 205413 (2017), arXiv:1612.05769
  49. Complex classes of periodically driven topological lattice systems, Michel Fruchart, Phys. Rev. B 93, 115429 (2016), arXiv:1511.06755
  50. Probing (topological) Floquet states through DC transport, Michel Fruchart, Pierre Delplace, Joseph Weston, Xavier Waintal, David Carpentier, Physica E 75 (2016) 287-294, arXiv:1507.00152
  51. Construction and properties of a topological index for periodically driven time-reversal invariant 2D crystals, David Carpentier, Pierre Delplace, Michel Fruchart, Krzysztof Gawędzki, Clément Tauber, Nuclear Physics B 896 (2015) 779-834, arXiv:1503.04157
  52. Topological index for periodically driven time-reversal invariant 2D systems, David Carpentier, Pierre Delplace, Michel Fruchart, Krzysztof Gawędzki, Phys. Rev. Lett. 114, 106806 (2015), arXiv:1407.7747
  53. Parallel Transport and Band Theory in Crystals, Michel Fruchart, David Carpentier, Krzysztof Gawędzki, EPL 106, 60002 (2014), arXiv:1403.2836
  54. An Introduction to Topological Insulators, Michel Fruchart, David Carpentier, Comptes Rendus Physique 14 (2013) 779-815, arXiv:1310.0255

Book

  1. Physique expérimentale, Michel Fruchart, Pierre Lidon, Étienne Thibierge, Maxime Champion, Arnaud Le Diffon, De Boeck Supérieur, 2016, ISBN: 978-2-8073-0285-3

Other

  1. De la lumière à sens unique : métamatériaux topologiques et guides d'onde unidirectionnels, Clément Tauber, Michel Fruchart, Le Rayon
  2. Topological phases of periodically driven crystals, Michel Fruchart, PhD thesis, tel-01398614v2 (with David Carpentier and Krzysztof Gawędzki)