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qubithubheh-plus-ground-state

Finds the ground state energy of helium hydride cation (HeH+) using VQE with a UCCSD-inspired 3-parameter ansatz. HeH+ is a 2-electron heteronuclear system with asymmetric nuclear charges, and was the first molecule to form in the universe. Exact ground state: -2.8620 Hartree (FCI/STO-3G).

RunCite

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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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circuit.py · 16 KB

Code

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Suggested citation

@software{qubithub_hehplusgroundstate_2026,
  author = {QubitHub Circuits},
  title = {VQE for HeH+ Ion},
  year = {2026},
  version = {v1},
  url = {https://qubithub.co/qubithub/heh-plus-ground-state},
}

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