# Exact Diagonalization library for quantum electron models

## TL;DR

EDLib is a C++ library that efficiently performs exact diagonalization for quantum electron models, enabling calculation of Green's functions and spin correlations for complex systems.

## Contribution

It introduces a flexible C++ template library with multiple Hamiltonian storage options for solving quantum electron models using exact diagonalization.

## Key findings

- Supports single-band Hubbard and multi-orbital Anderson models
- Provides computation of Green's functions and spin correlations
- Offers three Hamiltonian storage types for efficiency

## Abstract

We present an exact diagonalization C++ template library (EDLib) for solving quantum electron models, including single-band finite Hubbard cluster and multi-orbital impurity Anderson model. The observables that can be computed using EDLib are single particle Green's functions and spin-spin correlation functions. This code provides three different types of Hamiltonian matrix storage that can be chosen based on the model.