The source code and installation instructions are located in project's GitHub repository.

libpomerol API

Most of pomerol's API is defined in Pomerol namespace with an exception of the MPI tools that are defined in pMPI.

The entire library is available via a single include file pomerol.hpp.

A pomerol-based exact diagonalization program would normally proceed as follows.

Define an expression corresponding to the Hamiltonian of the system either in terms of libcommute's creation/annihilation operators (these are injected into the Pomerol namespace in pomerol/Operators.hpp) or by using lattice presets.
Construct an IndexClassification object that carries information about all fermionic single-particle states of the system (typically, by calling MakeIndexClassification()).
Construct system's Hilbert space by calling MakeHilbertSpace().
Employ a StatesClassification object to reveal invariant subspaces (sectors) of the Hamiltonian.
Define, prepare and diagonalize the Hamiltonian matrix of the system.
Define, prepare and compute the many-body DensityMatrix of the system.
Use a FieldOperatorContainer to allocate matrices of fermionic creation/annihilation operators (CreationOperator / AnnihilationOperator). and transform them into the eigenbasis of the Hamiltonian.
Finally, compute some of the following physically relevant quantities.
- Gibbs ensemble averages of operators of physical observables (EnsembleAverage).
- Single-particle fermionic Green's functions (GreensFunction, GFContainer).
- Dynamical susceptibilities – correlators of two MonomialOperator's (Susceptibility).
- 3-point susceptibilities – correlators of two fermionic and one bosonic quadratic operator (ThreePointSusceptibility, ThreePointSusceptibilityContainer).
- Two-particle fermionic Green's functions and irreducible vertices (TwoParticleGF, TwoParticleGFContainer, Vertex4).

All available classes and functions are grouped into a few modules, so you can check out the Modules page to get an overview of libpomerol's API.