Ground-state energies of the 1D Holstein polaron at ω/t=0.1 can be obtained within a few percent error from eigenvector continuation over two- and four-site segments, cutting VQE qubit counts from 507 to 11.
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Lattice stitching by eigenvector continuation for Holstein polaron
Ground-state energies of the 1D Holstein polaron at ω/t=0.1 can be obtained within a few percent error from eigenvector continuation over two- and four-site segments, cutting VQE qubit counts from 507 to 11.