Variational Monte-Carlo Method for Strongly Interacting Electrons
Although the variational Monte- Carlo method has been successfully used for a number of manybody problems such as normal state of 3He its application to the problem of electrons in solids has been rather limited and it is only quite recently that it has been tried on the Hubbard and periodic Anderson Hamiltonians. Its advantages are clear. It allows the essentially exact evaluation of matrix elements of wavefunctions which have strong shortrange correlations explicitly built in to them. This then enables various approximate schemes to be tested and the development of intuition about the properties of these wavefunctions.
KeywordsFermi Surface Hubbard Model Fermi Liquid Slater Determinant Approximate Scheme
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