2026
Bayesian Parameter Shift Rules in Variational Quantum Eigensolvers
Samuele Pedrielli, Christopher J. Anders, Lena Funcke, Karl Jansen, Kim Andrea Nicoli, Shinichi Nakajima
ICLR 2026poster
Parameter shift rules (PSRs) are key techniques for efficient gradient estimation in variational quantum eigensolvers (VQEs). In this paper, we propose their Bayesian variant, where Gaussian processes with appropriate kernels are used to estimate the gradient of the VQE objective. Our Bayesian PSR o…