Delta-Corrected Shot Reduction for Bypassing Optimization Plateaus in Variational Quantum Eigensolvers

arXiv:2611.10524v1 Announce Type: new Abstract: The variational quantum eigensolver (VQE) remains a cornerstone hybrid quantum-classical algorithm for quantum simulation, yet its scalability is fundamentally constrained by heavy measurement overheads. While strategies such as variance-preserved shot reduction (VPSR) mitigates this cost, they suffer from convergence instability and optimization stagnation caused by finite-sample bias in limited pilot shots. To overcome this limitation, we introduce delta-corrected shot reduction (DCSR), an analytically enhanced shot allocation strategy that rigorously mitigates finite-sample instability. Utilizing the multivariate delta method, we derive explicit higher-order bias correction terms for the empirical reduction factor.