Benchmark

H2O Water Molecule Simulation Benchmark

Variational Quantum Eigensolver (VQE) · Chemistry · 14 qubits · Qiskit Nature, PennyLane

Benchmark for quantum simulation of the water molecule (H2O), computing ground-state energies and potential energy surfaces using VQE. As a triatomic molecule with a non-trivial electronic structure, H2O serves as a step up in complexity from diatomic benchmarks like H2 and LiH. VQE implementations can approximate the ground-state energy with high chemical accuracy on both simulators and NISQ hardware.

VQEwaterchemistryground-statepotential-energy-surface

Benchmark for quantum simulation of the water molecule (H2O), computing ground-state energies and potential energy surfaces using VQE. As a triatomic molecule with a non-trivial electronic structure, H2O serves as a step up in complexity from diatomic benchmarks like H2 and LiH. VQE implementations can approximate the ground-state energy with high chemical accuracy on both simulators and NISQ hardware.

Key Metrics
Qubits required
14
Molecule complexity
Triatomic (3 atoms)
Why It Matters

Steps beyond simple diatomic benchmarks to a non-trivial electronic structure, testing whether VQE can handle increasing molecular complexity on NISQ hardware.

Hardware

Various (IBM Quantum, simulators)

Framework

Qiskit Nature, PennyLane