Physics-constrained variational quantum circuits maintain 25-47% higher fidelity than unconstrained ones at moderate noise, while zero-noise extrapolation cuts absolute error by 82-96% at low noise levels.
Universal cost bound of quantum error mitigation based on quantum estimation theory
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Quantum Error Mitigation Strategies for Variational PDE-Constrained Circuits on Noisy Hardware
Physics-constrained variational quantum circuits maintain 25-47% higher fidelity than unconstrained ones at moderate noise, while zero-noise extrapolation cuts absolute error by 82-96% at low noise levels.