ICFP Stat Physics 2016

From Werner KRAUTH

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* F. Wegner, "Spin-Ordering in a Planar Classical Heisenberg Model" Z. Phys 206, 465 (1967) (Exact solution of the harmonic approximation to the XY model, algebraic long-range correlations) * F. Wegner, "Spin-Ordering in a Planar Classical Heisenberg Model" Z. Phys 206, 465 (1967) (Exact solution of the harmonic approximation to the XY model, algebraic long-range correlations)
* J. M. Kosterlitz, D. M. Thouless "Ordering, Metastability and phase transitions in two-dimensional systems" J. Phys. C: Solid State Physics 6, 1181 (1973) (Nobel-prize winning paper, proposing topological excitations. For the free-energy argument for the XY model see p. 1190 ff). * J. M. Kosterlitz, D. M. Thouless "Ordering, Metastability and phase transitions in two-dimensional systems" J. Phys. C: Solid State Physics 6, 1181 (1973) (Nobel-prize winning paper, proposing topological excitations. For the free-energy argument for the XY model see p. 1190 ff).
-* J. Fröhlich, T. Spencer "The Kosterlitz-Thouless Transition in Two-Dimensional Abelian Spin Systems and the Coulomb Gas" Comm. Math. Phys. 81, 527 (1981) (Famous paper proving the existence of a low-temperature phase with algebraic correlations. Nuance: This paper proves the existence of a low-temperature phase but not of a KT transition).+* J. Fröhlich, T. Spencer "The Kosterlitz-Thouless Transition in Two-Dimensional Abelian Spin Systems and the Coulomb Gas" Comm. Math. Phys. 81, 527 (1981) (Important paper proving the existence of a low-temperature phase with algebraic correlations. Nuance: This paper proves the existence of a low-temperature phase but not the presence of a KT transition).
 +* E. Domany, M. Schick, and R. H. Swendsen "First-Order Transition in an xy Model with Nearest-Neighbor Interactions Phys. Rev. Lett. 52, 1535 (1984) (Paper explaining the two-energy scales J (for a first-order transition) and J_R (for the KT transition))
 +* M. Hasenbusch, "The two-dimensional XY model at the transition temperature: a high-precision Monte Carlo study" J. Phys. A: Math. Gen. 38, 5869 (2005) (This paper establishes beyond reasonable doubt that the transition in the XY model is indeed of the Kosterlitz-Thouless type. It also computes the critical temperature to 5 significant digits).
==Week 6 (12 October 2016): Two-dimensional Ising model: From Kramers & Wannier to Kac & Ward== ==Week 6 (12 October 2016): Two-dimensional Ising model: From Kramers & Wannier to Kac & Ward==

Revision as of 12:47, 19 October 2016

This is the homepage for the ICFP course: Statistical Physics: Concepts and Applications that is running from 7 September 2016 through 14 December 2016.

Lectures: Werner KRAUTH

Practicals & Homeworks: Maurizio FAGOTTI, Olga PETROVA

Look here for practical information

Contents

Week 7 (19 October 2016): Kosterlitz-Thouless physics (physics in two dimensions) 1/2: The XY (planar rotor) model

References for Week 7:

  • F. Wegner, "Spin-Ordering in a Planar Classical Heisenberg Model" Z. Phys 206, 465 (1967) (Exact solution of the harmonic approximation to the XY model, algebraic long-range correlations)
  • J. M. Kosterlitz, D. M. Thouless "Ordering, Metastability and phase transitions in two-dimensional systems" J. Phys. C: Solid State Physics 6, 1181 (1973) (Nobel-prize winning paper, proposing topological excitations. For the free-energy argument for the XY model see p. 1190 ff).
  • J. Fröhlich, T. Spencer "The Kosterlitz-Thouless Transition in Two-Dimensional Abelian Spin Systems and the Coulomb Gas" Comm. Math. Phys. 81, 527 (1981) (Important paper proving the existence of a low-temperature phase with algebraic correlations. Nuance: This paper proves the existence of a low-temperature phase but not the presence of a KT transition).
  • E. Domany, M. Schick, and R. H. Swendsen "First-Order Transition in an xy Model with Nearest-Neighbor Interactions Phys. Rev. Lett. 52, 1535 (1984) (Paper explaining the two-energy scales J (for a first-order transition) and J_R (for the KT transition))
  • M. Hasenbusch, "The two-dimensional XY model at the transition temperature: a high-precision Monte Carlo study" J. Phys. A: Math. Gen. 38, 5869 (2005) (This paper establishes beyond reasonable doubt that the transition in the XY model is indeed of the Kosterlitz-Thouless type. It also computes the critical temperature to 5 significant digits).

Week 6 (12 October 2016): Two-dimensional Ising model: From Kramers & Wannier to Kac & Ward

NB: In the text of the HW06, we suppose N=even. Furthermore, note that an identity cycle is a cycle of length 1. Text minimally modified on 16/10/2016.

References for Week 6:

  • W. Krauth, "Statistical Mechanics: Algorithms and Computations" (Oxford, 2006) section 5.1.3 (high-temperature expansion, following van der Waerden (1941)), and section 5.1.4 (Kac-Ward solution)).
  • R. P. Feynman "Statistical Mechanics: A set of Lectures" (Benjamin/Cummings, 1972) (thorough discussion of Kramers-Wannier duality which yields the value of T_c, some discussion of the Kac-Ward solution).
  • M. Kac, J. C. Ward, "A combinatorial solution of the two-dimensional Ising model" Physical Review 185, 832 (1952) (NB: The paper contains the explicit diagonalization of the matrix U).
  • J. M. Yeomans, "Statistical Mechanics of Phase Transitions (Oxford, 1992), chapter 6 (for exercise 1 of tutorial 06).

Week 5 (5 October 2016): Two-dimensional Ising model: From Ising to Onsager

References for Week 5:

  • R. Peierls, Proceedings of the Cambridge Philosophical Society, 32, 477 (1936) (famous loop-counting argument establishing spontaneous symmetry breaking in the two-dimensional Ising model below a finite temperature)
  • C. Bonati, Eur. J. Phys. 35, 035002 (2014) (generalization of the Peierls argument to higher dimensions)
  • M Plischke, B Bergersen, "Equilibrium Statistical Physics" (World Scientific) section 6.1 (Transfer matrix for the two-dimensional Ising model, Onsager's solution)
  • T D Schultz, D C Mattis, E Lieb, "Two-dimensional Ising model as a soluble problem of many fermions" Reviews of Modern Physics (1964) (Authoritative account of Onsager's solution).

Week 4 (28 September 2016): Physics in one dimension - Hard spheres and the Ising model

References for Week 4:

  • W. Krauth, "Statistical Mechanics: Algorithms and Computations" (Oxford, 2006) p. 269ff (hard-sphere partition function using the double substitution).
  • M Plischke, B Bergersen, "Equilibrium Statistical Physics" (World Scientific) p. 145f (some background material on the virial expansion), p. 77 ff (Ising chain, although our treatment was considerably different).
  • R. H. Swendsen, "Statistical mechanics of colloids and {Boltzmann's} definition of the entropy" American Journal of Physics 74, 187 (2006) (a good discussion of the Gibbs phenomenon)
  • D. J. Thouless, "Long-range order in one-dimensional Ising systems" Physical Review 187, 732 (1969) (Ingenious discussion of the 1/r^2 Ising model)
  • J. M. Kosterlitz, "Kosterlitz-Thouless physics: a review of key issues" Rep. Prog. Phys. 79 026001 (2016) (first two pages only, discussion and historical context for the Thouless paper. This is elementary to follow.).
  • C. Kittel, American Journal of Physics 37, 917 (1969) (First exercise of Tutorial 4)
  • J. A. Cuesta and A. Sanchez, J. Stat. Phys. 115, 869 (2004) (Third exercise of Tutorial 4, generalized Kittel model)

Week 3 (21 September 2016): Statistical mechanics and Thermodynamics

References for Week 3:

  • Kerson Huang, "Statistical Mechanics 2nd edition" (1987) (Tutorial Problem 1).
  • L. Pauling, J. Am. Chem. Soc. 12 (2680-2684), 1935.(Tutorial Problem 2 on residual entropy of ice).
  • Bramwell, Gingras, Science 294, 1495 ( 2001) (Spin ice in pyrochlore).

Week 2 (14 September 2016): Statistical inference

References for Week 2:

  • L. Wasserman, "All of Statistics, A Concise Course in Statistical Inference" (Springer, 2005) part 2
  • W. Krauth, "Statistical Mechanics: Algorithms and Computations" (Oxford, 2006) p. 58 only ;)
  • B. Efron, "Maximum likelihood and decision theory" Ann. Statist. 10, 340, 1982.
  • B. Efron, "Bootstrap methods: another look at the jackknife" The Annals of Statistics, 1-26, 1979.
  • P. Diaconis and B. Efron, "Computer intensive methods in statistics" Scientific American 248, no. 5, pp. 116-130, 1983.

Week 1 (7 September 2016): Probability theory


Syllabus

  • Week 1: Probability theory
    • Probabilities, probability distributions, sampling
    • Random variables
    • Expectations
    • Inequalities (Markov, Chebychev, Hoeffding)
    • Convergence of random variables (Laws of large numbers, CLT)
    • Lévy distributions
  • Week 2: Statistics (statistical inference, estimation, learning)
    • Point estimation, confidence intervals
    • Bootstrap
    • Method of moments
    • Maximum likelihood, Fisher information
    • Parametric Bootstrap
    • Bayes statistics
  • Week 3: Statistical mechanics and Thermodynamics
    • Rapid overview on the connection between statistical mechanics and thermodynamics
    • Ensembles and physical observables (partition function, energy, free energy, entropy, chemical potential, correlation functions, etc).
  • Week 4: Physics in one dimension
    • One-dimensional hard spheres, virial expansion, partition function
    • One-dimensional Ising model
    • Transfer matrix
    • Kittel model
    • Chui-Weeks model: Infinite-dimensional transfer matrix
    • One-dimensional Ising model with 1/r^2 interactions
  • Week 5: Two-dimensional Ising model: From Ising to Onsager
    • Peierls argument, Kramers-Wannier relation
    • Two-dimensional transfer matrix (following Schultz et al)
    • Jordan-Wigner transformation
    • Free energy calculation
    • Spontaneous magnetization, zero-field susceptibility
    • Kaufman, Ferdinand-Fisher, Beale
  • Week 6: Two-dimensional Ising model: From Kac and Ward to Saul and Kardar
    • Van der Waerden, low-temperature and high-temperature expansions
    • Duality
  • Week 7: Physics in two dimensions (Kosterlitz-Thouless physics): XY (planar rotor) model
    • Peierls argument
    • Mermin-Wagner theorem
    • Non-universality
  • Week 8: Physics in two dimensions (Kosterlitz-Thouless physics): Particle systems, superfluids
  • Week 09: Physics in infinite dimensions: Mean-field theory, Scaling
  • Week 10: Physics in infinite dimensions: Landau theory
  • Week 11: Renormalization group
  • Week 12: The Solid state: Order parameters, correlation functions
  • Week 13: Quantum systems - bosons.
  • Week 14: Quantum systems - spin systems
  • Week 15: Equilibrium and transport, Fluctuation-dissipation theorem.

References

Lecture notes will be available before each course.

Books

  • L. Wasserman, "All of Statistics, A Concise Course in Statistical Inference" (Springer, 2005)
  • W. Krauth, "Statistical Mechanics: Algorithms and Computations" (Oxford, 2006)
  • M Plischke, B Bergersen, "Equilibrium Statistical Physics" (World Scientific)
  • L. D. Landau, E. M. Lifshitz, "Statistical Physics" (Pergamon)
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