Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2003-03-03
Physics
Condensed Matter
Statistical Mechanics
4+97 pages, 28 figures
Scientific paper
These are lecture notes of a course that I gave to people doing research for their Ph.D. thesis in theoretical chemistry or spectroscopy. The course was given on December 9-13, 2002, in Han-sur-Lesse, Belgium. The lecture notes start with the lattice-gas model that is used to describe the reactions on a surface. I derive a Master Equation, which gives the evolution of this model. The Master Equation contains transition probabilities (or rate constants) for the reactions. I show how these transition probabilities can be obtained from quantum chemical calculations or from experiments. The Master Equation can be solved using several different Monte Carlo algorithms. I derive these algorithms, and show what their advantages and drawbacks are. I use a number of simple reaction systems to illustrate various possibilities that one has when modeling reactions on surfaces. Finally, I discuss more realistic systems to show what kind of kinetic phenomena can be studied with Monte Carlo simulations.
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