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 active 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.

Before that, I was a postdoctoral fellow at the University of Chicago and at the Lorentz Institute for theoretical physics, working in the group of Vincenzo Vitelli. Even before, I worked on topological phases of periodically driven crystals as a PhD student at the Laboratoire de Physique of the ENS de Lyon with David Carpentier and Krzysztof Gawędzki.

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. 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
  2. Non-Hermitian wave turbulence, Xander M. de Wit, Sébastien Galtier, Michel Fruchart, Federico Toschi, Vincenzo Vitelli, preprint, arXiv:2504.15403
  3. Non-reciprocal spin-glass transition and aging, Giulia Garcia Lorenzana, Ada Altieri, Giulio Biroli, Michel Fruchart, Vincenzo Vitelli, preprint, arXiv:2408.17360
  4. 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
  5. 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
  6. 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
  7. Sociohydrodynamics: data-driven modelling of social behavior, Daniel S. Seara, Jonathan Colen, Michel Fruchart, Yael Avni, David Martin, Vincenzo Vitelli, preprint, arXiv:2312.17627
  8. 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
  9. Information theory for model reduction in stochastic dynamical systems, Matthew S. Schmitt, Maciej Koch-Janusz, Michel Fruchart, Daniel S. Seara, Vincenzo Vitelli, preprint, arXiv:2312.06608
  10. Nonreciprocal Ising model, Yael Avni, Michel Fruchart, David Martin, Daniel Seara, Vincenzo Vitelli, Phys. Rev. Lett. 134, 117103 (2025), arXiv:2311.05471
  11. 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
  12. The 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, preprint, arXiv:2307.08251
  13. Viscous tweezers: controlling particles with viscosity, Tali Khain, Michel Fruchart, Vincenzo Vitelli, Physical Review Research 6, L042039 (2024), arXiv:2307.04948
  14. 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
  15. Odd Viscosity and Odd Elasticity, Michel Fruchart, Colin Scheibner, Vincenzo Vitelli, Annual Review of Condensed Matter Physics 14, 471-510 (2023), arXiv:2207.00071
  16. 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
  17. 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
  18. Exceptional points in nonlinear and stochastic dynamics, Cheyne Weis, Michel Fruchart, Ryo Hanai, Kyle Kawagoe, Peter B. Littlewood, Vincenzo Vitelli, preprint, arXiv:2207.11667
  19. 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
  20. Internal wave crystals, Sasan J. Ghaemsaidi, Michel Fruchart, Severine Atis, preprint, arXiv:2111.07984
  21. Systematic generation of Hamiltonian families with dualities, Michel Fruchart, Claudia Yao, Vincenzo Vitelli, Phys. Rev. Research 5, 023099 (2023) arXiv:2108.11138
  22. 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
  23. Liquid-crystal-based topological photonics, Hamed Abbaszadeh, Michel Fruchart, Wim van Saarloos, Vincenzo Vitelli, PNAS 118 (2021), arXiv:2005.02476
  24. Non-reciprocal phase transitions, Michel Fruchart, Ryo Hanai, Peter B. Littlewood, Vincenzo Vitelli, Nature 592, 363–369 (2021) arXiv:2003.13176
  25. 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
  26. Symmetries and dualities in the theory of elasticity, Michel Fruchart, Vincenzo Vitelli, Phys. Rev. Lett. 124, 248001 (2020), arXiv:1912.02384
  27. 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
  28. 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
  29. Dualities and non-Abelian mechanics, Michel Fruchart, Yujie Zhou, Vincenzo Vitelli, Nature 577, 636–640 (2020), arXiv:1904.07436
  30. Machine learning assisted measurement of local topological invariants, Marcello D. Caio, Marco Caccin, Paul Baireuther, Timo Hyart, Michel Fruchart, preprint, arXiv:1901.03346
  31. 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
  32. Metamaterials: The effective way, Michel Fruchart & Vincenzo Vitelli, Nature Materials 17, 292–293 (2018)
  33. Waves cornered, Michel Fruchart & Vincenzo Vitelli, Nature 555, 318--319 (2018)
  34. Soft self-assembly of Weyl materials for light and sound, Michel Fruchart, Seung-Yeol Jeon, Kahyun Hur, Vadim Cheianov, Ulrich Wiesner, Vincenzo Vitelli, PNAS (2018), arXiv:1711.11019
  35. 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
  36. Complex classes of periodically driven topological lattice systems, Michel Fruchart, Phys. Rev. B 93, 115429 (2016), arXiv:1511.06755
  37. 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
  38. 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
  39. 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
  40. Parallel Transport and Band Theory in Crystals, Michel Fruchart, David Carpentier, Krzysztof Gawędzki, EPL 106, 60002 (2014), arXiv:1403.2836
  41. 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