A program to evaluate closed diagrams algebraically for angular momentum coupled product operators

Title of program: CONTRACTION-JT-RECOUPLING
Catalogue Id: AAAM_v1_0

Nature of problem
The many particle trace of a product operator, expressed in terms of angular-momentum coupled spherical tensor creation and annihilation operators, can be evaluated as the sum of the different ways or diagrams to contract all the single particle operators. In the coupled representation, the process of contraction involves recouplings of angular momenta and this can be tedious. The program is constructed to perform algebraically the contractions and the associated angular momentum recouplings. Th ...

Versions of this program held in the CPC repository in Mendeley Data
AAAM_v1_0; CONTRACTION-JT-RECOUPLING; 10.1016/0010-4655(80)90002-8

This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018)

程序名称：CONTRACTION-JT-RECOUPLING
目录号：AAAM_v1_0

问题属性
以角动量耦合的球张量产生与湮灭算符（angular-momentum coupled spherical tensor creation and annihilation operators）表述的积算符（product operator）的多粒子迹（many particle trace），可通过将所有单粒子算符进行缩并（contraction）的各类方式或图示之和进行求值。在耦合表象（coupled representation）中，缩并过程涉及角动量的再耦合（recoupling），该过程往往较为繁琐。本程序旨在通过代数运算完成算符缩并及相关的角动量再耦合计算。[原文此处内容未完]

本程序在Mendeley数据的CPC程序库中的版本信息：AAAM_v1_0; CONTRACTION-JT-RECOUPLING; 10.1016/0010-4655(80)90002-8

本程序源自贝尔法斯特女王大学所持有的CPC程序库（1969-2018年）