---
name: openfermion-hamiltonian-f9be51b9df20
description: Molecular Hamiltonian construction skill using OpenFermion
allowed-tools:
  - Bash
  - Read
  - Write
  - Edit
  - Glob
  - Grep
metadata:
  specialization: quantum-computing
  domain: science
  category: quantum-chemistry
  phase: 6
graph:
  domains: [domain:quantum-computing]
  specializations: [specialization:quantum-computing]
  skillAreas: [skill-area:physics-simulation, skill-area:mathematical-reasoning, skill-area:statistical-analysis]
  workflows: [workflow:experiment-design]
  roles: [role:research-scientist, role:computational-scientist]
---

# OpenFermion Hamiltonian

## Purpose

Provides expert guidance on molecular Hamiltonian construction and fermion-to-qubit mappings using OpenFermion for quantum chemistry applications.

## Capabilities

- Molecular Hamiltonian generation
- Jordan-Wigner transformation
- Bravyi-Kitaev transformation
- Parity transformation
- Second quantization handling
- Symmetry reduction
- Active space selection
- Hamiltonian term grouping

## Usage Guidelines

1. **Molecular Setup**: Define molecular geometry and basis set
2. **Hamiltonian Generation**: Compute molecular integrals and construct Hamiltonian
3. **Transformation Selection**: Choose appropriate fermion-to-qubit mapping
4. **Qubit Reduction**: Apply symmetry and active space reductions
5. **Term Analysis**: Analyze Hamiltonian structure for circuit design

## Tools/Libraries

- OpenFermion
- OpenFermion-PySCF
- OpenFermion-Psi4
- Qiskit Nature
- PennyLane


---
Source attribution: a5c-ai
Original project: https://github.com/a5c-ai/babysitter/blob/feb68abe397acc14f32b34984975c48fedba2b33/library/specializations/domains/science/quantum-computing/skills/openfermion-hamiltonian/SKILL.md
License: MIT
License information: https://opensource.org/license/mit
Original upstream instructions; downloaded from Mega AI Hub.

## Upstream license notice

# MIT License

Copyright (c) 2025 A5C AI

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.



# Mega AI Hub resource metadata

Creator / publisher: a5c-ai
Original project: https://github.com/a5c-ai/babysitter/blob/feb68abe397acc14f32b34984975c48fedba2b33/library/specializations/domains/science/quantum-computing/skills/openfermion-hamiltonian/SKILL.md
Attribution basis: Source repository record

Fields of work: Data & Analytics, Development & Engineering, Education & Research, Product Management
Roles: Data Scientist, ML / AI Engineer, Product Manager, Researcher, Technical Product Manager
Specialties: Specialty not specified
Tools: Openfermion, Pennylane, Qiskit
Country applicability: Country not specified
Classification basis: Source catalog labels
Instruction SHA-256: 920bc2c486db0dcc6a9d9256aef4818654077465bc6fa9d3eedc7194a0d0f6ec