Fig. 4: Experimental application to a multi-dimensional problem.
From: Variational quantum algorithm with information sharing
Ground state energies (in Hartree) for a linear chain of H3, over two-dimensional parameter space (x1, x2) where x1 the distance between the first and second H atoms and x2 the distance between the second and third. a the exact ground state energy surface for an 8 × 8 grid of x1 and x2 values, compared to experimental results from running VQE + BOIS on from IBM’s Paris chip. The optimisations converged in ten iterations to compute the entire surface. b the error in the VQE + BOIS results, showing systematic offsets due to gate errors.
