QForte: an efficient state simulator and quantum algorithms library for molecular electronic structure

Understand

We introduce a novel open-source software package QForte, a comprehensive development tool for new quantum simulation algorithms.

• QForte incorporates functionality for handling molecular Hamiltonians, fermionic encoding, ansatz construction, time evolution, and state-vector simulation, requiring only a classical electronic structure package as a dependency.
• QForte also contains black-box implementations of a wide variety of quantum algorithms including (but not limited to): variational and projective quantum eigensolvers, adaptive eigensolvers, quantum imaginary time evolution, quantum Krylov methods, and quantum phase estimation.
• We highlight two features of QForte: i) how the Python class structure of QForte enables the facile implementation of new algorithms, and ii) how existing algorithms can be executed in just a few lines of code.