Bernard Bernu
Evaluation by Path Integral Monte Carlo of exchange frequencies of two-dimensional 3He lattices on graphite


  1. Decoupling the spin and R degrees of freedom
    1. phonons contributions
    2. spin contributions
    3. the experimental phase diagram
  2. Thouless Theory :
    1. N-body spectra
    2. how to build a N-body state
    3. conditions : rare events, localization, Fermi statistics
    4. mapping on a 2 wells 1D system.
  3. PIMC method :
    1. reaction coordinate
    2. Bennet method
    3. convergence problems:
    4. N, T, tau
    5. c, delta min max, beta0
  4. Multi-exchange Hamiltonian :
    1. spin phase diagram
    2. extension of the notion of ferromagnetism/antiferromagnetism
  5. The limits of this approach
NATO ASI, Cornell Theory Center,

Last modified: Thu Jun 11 17:01:06 EDT 1998