# Error estimates for extrapolations with matrix-product states

@article{Hubig2017ErrorEF, title={Error estimates for extrapolations with matrix-product states}, author={Claudius Hubig and Jutho Haegeman and Ulrich Schollwock}, journal={Physical Review B}, year={2017}, volume={97}, pages={045125} }

We introduce an error measure for matrix-product states without requiring the relatively costly two-site density-matrix renormalization group (2DMRG). This error measure is based on an approximation of the full variance . When applied to a series of matrix-product states at different bond dimensions obtained from a single-site density-matrix renormalization group (1DMRG) calculation, it allows for the extrapolation of observables towards the zero-error case representing the exact ground state…

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