Monte Carlo Methods

  • definitions of probability
  • binomial, Gaussian, and Poisson distributions
  • characteristic functions and sums of random variables, Central Limit Theorem,
  • random walks

Random number generators 

  • randomness in Nature vs codes
  • congruential rndm(), overflow problems, rndm-generator period, shuffled rndm()
  • transformation method
  • generating arbitrary distributions; rejection and hybrid methods
  • universal integrals evaluator
  • Why using random sampling make sense at all; body volume problem
  • ergodicity, balance Eq., detailed balance Eq., Metropolis algorithm
  • single spin-flip algorithm for the Ising model; heat bath update
  • convergence, errorbars, blocking, bootstrap and jackknife methods
  • autocorrelation function and thermalization time
  • quantities to calculate, estimators
  • correlation functions, Fast Fourier Transform    
  • reweighing, histogram, and multiple histogram methods
  • continuous spin  XY- and  O(N)-models
  • q-state Potts model
  • glasses
  • first-order transitions
  • conserved order-parameter Ising model and the classical lattice gas
  • polymers
  • kinetic equations

From “simple” to “art”: more efficient and elaborate methods

  • What a better data structure can do?
  • Swendsen-Wang, Wollf and Niedermayer cluster algorithms
  • invaded cluster algorithm
  • worm algorithm (WA)
  • high-temperature expansions for various models and WA
  • WA for polymers
  • entropic sampling; Wang-Landau approach
  • simulated tempering, parallel tempering

Quantum Monte Carlo

  • quantum-to-classical maping; Feynman representation of Quantum mechanics
  • using path-integrals in discrete and continuous spaces; quantum configuration space
  • sign problem
  • diagrammatic expansions, Feynman diagrams
  • path-integral MC in continuous space
  • diagrammatic MC; how it works for the interacting lattice systems
  • s-wave scattering problem example
  • Worm algorithm for quantum models
  • MC estimators in quantum systems
  • Stochastic series expansion
  • Variational MC
  • Diffusion/projection MC