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qubithubh2-ground-state

Finds the ground state energy of the hydrogen molecule (H2) using the Variational Quantum Eigensolver (VQE) — a hybrid quantum-classical algorithm that pairs a parameterized 2-qubit ansatz with COBYLA optimization. The qubit Hamiltonian is derived from the STO-3G basis via parity mapping with two-qubit reduction, giving an exact ground state of -1.1373 Hartree.

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Framework
Qiskit
Qubits
2
Depth
10
Gate set
RY, CX
Licence
Not specified
Version
v1
Updated
3 days ago
Last run
3 months ago

Circuit

circuit.py · Qiskit · depth 10
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qubithub.toml · 324 B

Code

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Suggested citation

@software{qubithub_h2groundstate_2026,
  author = {QubitHub Circuits},
  title = {VQE for H2 Molecule},
  year = {2026},
  version = {v1},
  url = {https://qubithub.co/qubithub/h2-ground-state},
}

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