Error mitigation does not restore expressibility as a reliable predictor of VQE performance under noise, while simple circuit topology metrics like two-qubit gate count predict PEC degradation better in tested cases.
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Expressibility, Noise, and Error Mitigation in VQE Ansatz Selection
Error mitigation does not restore expressibility as a reliable predictor of VQE performance under noise, while simple circuit topology metrics like two-qubit gate count predict PEC degradation better in tested cases.