qubithubbeh2-ground-state

Finds the ground state energy of beryllium hydride (BeH2) using VQE — the largest molecule in the VQE progression with 6 qubits, a 2-layer hardware-efficient ansatz, and 24 variational parameters. Uses a simplified 14-term Hamiltonian with exact ground state -15.835 Hartree (FCI/STO-3G). Demonstrates scaling challenges including barren plateaus and parameter landscape complexity.

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Framework: Qiskit
Qubits: 6
Depth: 25
Gate set: RY, RZ, CX
Licence: Not specified
Version: v1
Updated: 3 days ago
Last run: 3 months ago

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circuit.py · Qiskit · depth 25

metadata.json · 441 B

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@software{qubithub_beh2groundstate_2026,
  author = {QubitHub Circuits},
  title = {VQE for BeH2 Molecule},
  year = {2026},
  version = {v1},
  url = {https://qubithub.co/qubithub/beh2-ground-state},
}

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