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qubithubh2-excited-states

Finds both ground and first excited states of the hydrogen molecule (H2) using Variational Quantum Deflation (VQD) — a sequential variational algorithm that adds overlap penalties to enforce orthogonality between solutions. The energy gap to the first excited state (~0.85 Ha) determines the molecule's UV absorption spectrum.

RunCite
Framework
Qiskit
Qubits
2
Depth
6
Gate set
RY, CX
Licence
Apache-2.0
Version
v1
Updated
1 day ago
Runs
None completed

Circuit

circuit.py · Qiskit · depth 6
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qubithub.toml · 340 B

Code

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Suggested citation

@software{qubithub_h2excitedstates_2026,
  author = {QubitHub Circuits},
  title = {H2 Excited States (VQD)},
  year = {2026},
  version = {v1},
  url = {https://qubithub.co/qubithub/h2-excited-states},
}

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