Jorge Kurchan – LPENS, École Normale Supérieure
Wednesday, September 24th, 2025
Zoom opens: 10:30AM DST
Seminar begins: 10:45AM DST
Do Lyapunov exponents measure chaos?
The solar system has a relatively large Lyapunov exponent, and yet has been stable for much longer than the inverse Lyapunov time. Similarly, almost integrable systems like the low energy Fermi-Pasta-Ulam chain take much longer to thermalize than one would expect from their Lyapunov exponent.
This phenomenon has more recently been studied in quantum systems .