alvarorga / pyexact

Python library for computing exact diagonalizations

pyExact

Python library for computing exact diagonalizations of hard-core bosons and fermionic systems.

Dependencies

To use the library you need the following set of packages:

• Numpy
• Scipy
• Numba (if you cannot install Numba then you could remove all @njit() decorators above the functions, but the scripts will run much slower)

Usage

• To build a full Hamiltonian use the function build_mb_hamiltonian in module build_mb_hamiltonian.py. The function automatically takes care of writing the Hamiltonian in a dense or sparse format in the most efficient way.

• To compute the expected values of the matrices P and D, you have to go to functions compute_P and compute_D in module compute_expected.py.