Amos Maritan

Pays:Italie

Cours

The purpose of the course is to provide the student with a wide vision on how theoretical physics can contribute to understand phenomena in a variety of fields ranging from “classical” subjects like diffusion and quantum mechanics to a more general physics of complex systems. Particular emphasis is placed on the relationships between different topics, allowing for a unified mathematical approach where the concept of universality will play an important role.

Catégorie DIPARTIMENTO DI FISICA E ASTRONOMIA "GALILEO GALILEI" - DFA / A.A. 2022 - 2023 / Corsi di laurea magistrale / SC2443 - PHYSICS OF DATA

Statistical Mechanics of Complex Systems (2024-25)

Welcome Message

Welcome to the course on Statistical Mechanics of Complex Systems! We are excited to have you embark on this journey into the fascinating world of statistical physics and complex systems. Throughout this course, you will develop a strong foundation in classical statistical mechanics while also exploring modern applications in stochastic dynamics, community modeling, and phase transitions. We encourage active participation, curiosity, and collaboration. Looking forward to a great academic year together!

Course Description and Goals

This course provides a comprehensive introduction to Statistical Mechanics, from fundamental classical principles to the study of complex systems. The goal is to equip students with analytical and computational tools to understand equilibrium and non-equilibrium statistical systems, stochastic processes, and phase transitions. Students will develop problem-solving skills applicable to physics, biology, and interdisciplinary fields.

Synthetic Program

First Part: Classical Statistical Mechanics (3 CFU)

Fundamental ensembles (micro-canonical, canonical, and grand-canonical), entropy, and thermodynamics.

Probability distributions, characteristic functions, and saddle-point approximations.

Maxwell velocity distribution, thermodynamic potentials, Legendre transforms, and phase space analysis.

Diffusion processes, stochastic processes, Markov processes, and the diffusion equation.

Second Part: Statistical Mechanics of Complex Systems (6 CFU)

Stochastic dynamics: Markov processes, master equations, and Langevin/Fokker-Planck equations.

Community dynamics: stochastic amplification, predator-prey models, and biodiversity theory.

Stochastic resonance, escape processes, first-passage times, and transition rates.

Spatial effects, voter models, and biodiversity calculations.

Lattice Gas and Ising Model: phase transitions, mean-field approximations, and critical behavior.

References

Lecture notes and textbooks by Sethna, Gardiner, Bressloff, and Baxter, along with key scientific publications, provide theoretical foundations and practical applications.

This course prepares students for advanced research in statistical mechanics and complex systems.


Catégorie DIPARTIMENTO DI INGEGNERIA CIVILE, EDILE E AMBIENTALE - ICEA / A.A.2024 - 2025 / Corsi di laurea magistrale / IN2551 - MATHEMATICAL ENGINEERING