PhD in Physics

Université Paris-Saclay

你好!(pronounced nee haow)

Welcome to my homepage! My name is Li Gan. I am a PhD graduate in physics at LPTMS, Université Paris-Saclay, under the supervision of Professor Stéphane Ouvry. My thesis mainly focuses on the enumeration of closed lattice random walks according to their algebraic area (a.k.a. signed area), with connections to quantum exclusion statistics, as well as the combinatorics of generalized Dyck and Motzkin paths.

News: I am delighted to give a seminar talk at LIPN, Université Sorbonne Paris Nord, in October 2023. Here are my slides.

The most difficult thing is not facing setbacks and frustrations, but facing them without losing enthusiasm for life. Ko Wen-je, former mayor of Taipei City


  • Statistical mechanics
  • Lattice random walks
  • Enumerative combinatorics
  • Exactly solvable models
  • Combinatorial physics


  • PhD in Physics, 2024

    Université Paris-Saclay

  • Diplôme d'Ingénieur, 2018

    École Centrale Paris

  • BSc in Mathematics, 2015

    École Centrale de Pékin



  • Bâtiment Pascal n° 530, rue André Rivière, Orsay, 91405
  • Enter Building No. 530 and take stairs to Office L221 on the 3rd floor
  • Monday - Friday 9:30 - 11:30, 12:00 - 19:30