Symmetric-group approach to the study of the traces of <i>p</i>-order reduced-density operators and of products of these operators

Josep Planelles; C. Valdemoro; J. Karwowski

doi:10.1103/PhysRevA.41.2391

Symmetric-group approach to the study of the traces of p-order reduced-density operators and of products of these operators

Josep Planelles, C. Valdemoro, and J. Karwowski

Phys. Rev. A 41, 2391 – Published 1 March 1990

Abstract

In this work we give the values of traces of p-order reduced-density operators. These traces are obtained by application of the spin functions and of the symmetric-group properties. The relations obtained here will allow an easy and fast evaluation of the high-order spin-adapted reduced Hamiltonian matrix elements and high-order Hamiltonian moments.