Annealing-based approach to solving partial differential equations

Solving partial differential equations using an annealing-based approach is based on solving generalized eigenvalue problems. When a partial differential equation is discretized, it leads to a system of linear equations (SLE). Solving an SLE can be expressed as a general eigenvalue problem, which can be converted into an optimization problem with the objective function being a generalized Rayleigh quotient. The proposed algorithm allows the computation of eigenvectors at arbitrary precision without increasing the number of variables using an Ising machine. Simple examples solved using this method and theoretical analysis provide a guideline for appropriate parameter settings.