Berlin 2008 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 24: Correlated Electrons: Low-dimensional Systems - Models

TT 24.12: Vortrag

Mittwoch, 27. Februar 2008, 17:00–17:15, H 2053

Two particle excitations of projected wavefunctions. — •Tejaswini Dalvi and Claudius Gros — ITP, J.W. Goethe University, Frankfurt

The study of projected wavefunctions involves extensive use of Gutzwiller approximation (GA), along with Variational Monte Carlo (VMC), to study ground state properties. Recent studies include, study of properties of elementary excitations in doped Mott-Hubbard systems in detail by Renormalized Mean Field Theory (RMFT) and VMC. Important progress has been made in extending the technique of GA to calculate matrix elements in partially projected wavefunctions.

This generalization has allowed construction of normalized projected excitations for Fermi sea and BCS wavefunctions and evaluation of matrix elements between ground state and excited states. We here propose to study the particle-particle, hole-hole and particle-hole scattering for projected particle and projected hole state by generalised GA and VMC. This aims at laying foundation for a "Projected Fermi-liquid Theory".