ferrmion

This codebase contains methods to generate qubit Hamiltonians from fermionic Hamiltonians.

Encodings

• Ternary Tree encodings

  Any ternary tree can be generated by adding nodes to a tree structure, and functions exist to easily create standard encodings including: Jordan-Wigner, Parity, Bravyi-Kitaev and JKMN

• k-NTO encodings

  A non-ternary-tree majorana string encoding with the maximal non-trivial overlap possible. Only works for systems with even numbers of modes (i.e. all spin-orbit Hamiltonians)

Optimizations

Enumeration Scheme

• $(\lambda+\mu)$ Evolutionary Algorithm

Ternary Trees

• Reduced Entanglement Ternary Trees

Hamiltonians

Functions to produce Hamiltonian templates and enumerated encodings are available in ferrmion.hamiltonians

• Molecular Hamiltonian (Born-Oppenheimer Approximation)

Development

For information on development, check out the project documentation.

If you find an error in the code or documentation, please raise an issue on the GitHub Repo