Variational Jastrow coupled-cluster method of strongly correlated quantum many-body systems

por Yang Xian (School of Physics and Astronomy, University of Manchester)

miércoles 23 ene. 2008 11:30 → 12:30 Europe/Madrid

Sala de Juntas del IFIC (Edf. Institutos de Investigación)

Introduction to variational coupled-cluster method (VCCM) and its application to quantum antiferromagnets with improved results for the ground state over spin-wave theory and a new type of collective excitation. Second part of the talk will focus on extension of the VCCM to include an additional Jastrow correlated function for correct description of strongly correlated boson or fermion systems. A generalized linked-cluster expansion is employed and an explicit energy functional is obtained. Possible applications will be discussed.