On the evaluation of matrix elements in partially projected wave functions

Details On the evaluation of matrix elements in partially projected wave functions On the evaluation of matrix elements in partially projected wave functions

2005-03-07

arxiv.org/abs/cond-mat/0503143v1

Phys. Rev. B, 72, 144505 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

10.1103/PhysRevB.72.144505

We generalize the Gutzwiller approximation scheme to the calculation of nontrivial matrix elements between the ground state and excited states. In our scheme, the normalization of the Gutzwiller wave function relative to a partially projected wave function with a single non projected site (the reservoir site) plays a key role. For the Gutzwiller projected Fermi sea, we evaluate the relative normalization both analytically and by variational Monte-Carlo (VMC). We also report VMC results for projected superconducting states that show novel oscillations in the hole density near the reservoir site.

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