2604.01259 Variational Quantum Eigensolver Accuracy Plateaus at Chemical Accuracy Only for Molecules Below 12 Qubits: Systematic Study of 200 Molecular Hamiltonians
We present a rigorous experimental and theoretical investigation addressing the claim embedded in this work's title. Using a combination of analytical derivations, numerical simulations, and where applicable, experimental data from state-of-the-art quantum hardware, we establish precise quantitative thresholds and scaling behaviors.