Laboratoire de Physique Théorique

de la Matière Condensée


I am a theoretical physicist working in the fields of condensed matter and quantum physics. I hold a CNRS position since 2012 (research director since 2017). I am located at Laboratoire de Physique Théorique de la Matière Condensée (LPTMC, Sorbonne Université, Paris). Between 2004 and 2012, I was an assistant-professor (maître de conférences) at Université Paris-Sud working in the theory group of the Laboratoire de Physique des Solides (LPS, Université Paris-Sud, Orsay). I am still a regular visitor there. Currently scientific secretary of the CoNRS in section 02 for theoretical physics.


LPTMC, Sorbonne Université, Tour 12-13/13-23, Boîte 121, 4, Place Jussieu,75252 Paris Cedex 05, France

Office: corridor 13-23, 5th floor, room 5-36

Phone :   + 33 (0)1 44 27 44 19/+33 (0)6 75 04 99 14

Email: fuchs(at) or jean-noel.fuchs(at)




Key words: Cold atomic gases. Spin waves. Graphene and more generally Dirac fermions in condensed matter systems. Quantum Hall effect. Berry (geometrical) phases and band theory. Topological insulators. Orbital magnetism. Semiclassical techniques. Quasicrystals. Hofstadter butterfly. Frustrated quantum magnetism and anyons. Majorana fermions. Quantum walks. String nets. Topological order.


Publications available on the arXiv web site. See also Orcid or google scholar .

PhD thesis (doctorat 2003) "Contribution à la mécanique statistique quantique des gaz froids".

Habilitation (HDR 2013) "Dirac fermions in graphene and analogues: magnetic field and topological properties". 


Popular science articles on graphene (in French): Images de la physique 2007, Pour la Science 2008, Bulletin de la Société Française de Physique 2011.


A book edited on Dirac matter (séminaire Poincaré june 2014)


A colloquium on topological phases of matter (ENS colloquium, may 2017)


Gerontometrics: age-factor = 46



2020-2022: Option de physique théorique en L3 (LU3PY035): cours sur les intégrales de chemin et sur les symétries. Thierry Hocquet s'occupe de la partie mécanique analytique.


Lectures on Geometrical band theory and topological insulators (IQUPS Orsay January 2019, EPICQUR Cargèse August 2019, Faculté des Sciences de Tunis Novembre 2019).

Scan of handwritten notes:

Lecture 1: topological defects and Dirac's magnetic monopole

Lecture 2: geometrical band theory

Lecture 3: time-reversal breaking topological insulator (Chern insulator, Haldane model)

Lecture 4: time-reversal invariant topological insulator (Z2 insulator, Kane-Mele model)

Lecture 5: 2D topological superconductivity


Cours "Isolants topologiques" à l'INSP Jussieu (septembre-octobre 2017)

Le scan des notes de cours (in french) est disponible ici


From 2013 to 2018, I have been teaching a course, together with Giuliano Orso, on ``Symmetries and quantum field theory" at the Master 2 Concepts Fondamentaux de la Physique (ICFP) in the ``quantum physics'' speciality. 

Lecture notes, problem sheets (from previous exams) and solutions are available here.


From 2004 to 2012, I was an assistant-professor (maître de conférences) at Université Paris-Sud teaching wave physics, quantum mechanics, statistical physics, solid state physics, broken symmetries and statistical field theory, condensed matter field theory, physics for 1st year medical studies, etc.


Lecture notes on graphene with Mark Goerbig (2008).


PhD supervision


- Yi Liu (co-supervised with Frédéric Piéchon), "Dynamics, synchronization and spin squeezing in a two-spin model" (2010-2013) thesis (now engineer at CEA?)

- Arnaud Raoux (co-supervised with Gilles Montambaux and Frédéric Piéchon), "Magnétsime orbital et aspects géométriques de la théorie des bandes" (2013-2017) thesis (now PRAG at Sorbonne université)

- Frédéric Combes (co-supervised with Frédéric Piéchon), "Thermodynamique de la réponse électrique dans les isolants de bande - Synchronisation et écho de spin dans les gaz d'atomes froids" (2015-2018) thesis (now software engineer at Descartes Underwriting)

Hugo Perrin (co-supervised with Rémy Mosseri), "Marches quantiques sous champ magnétique et cages d’Aharonov-Bohm" (2018-2021) thesis  (now post-doc at KIT in Karlsruhe)

- Anna Ritz-Zwilling (co-supervised with Julien Vidal), "String-net models" (2021-...) 



Séminaire on the theory of quantum matter (TQM) in Jussieu

TopoAnyons: doctoral school on Topological order: Anyons and Fractons at les Houches physics school (April 1-12 2024)

UTMB 2020: physique quantique mésoscopique: conference in honor of Gilles Montambaux (Orsay June 23-24 2022)

Chiral modes in optics and electronics of 2D systems: workshop in Aussois November 26-28 2018

Meso2016: physics "summer school" in Cargèse (Corsica, France) 31 october 2016 to 12 november 2016

Séminaire Poincaré (Bourbaphy)