Short introduction to the Gutzwiller approximation in many-body physics

Short introduction to the Gutzwiller approximation in many-body physics

Seminar author:Simone Paganelli

Event date and time:02/11/2011 02:00:pm

Event location:Aula C5/012 (Facultat Ciències, UAB)

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The zero-temperature properties of a many-body system can be studied by  variational methods. For strongly correlated particles in a lattice,  Gutzwiller approximation provides an ansatz for the ground state which is quite accurate in predicting  the transition between Mott insulating and conducting phases. In this seminar, a general formulation of the method will be given together with some relevant examples. The connection with standard mean field theory and the limitations of this approximation will be also  discussed.