Error estimates for extrapolations with matrix-product states

  title={Error estimates for extrapolations with matrix-product states},
  author={Claudius Hubig and Jutho Haegeman and Ulrich Schollwock},
  journal={Physical Review B},
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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  • LegezaFáth
  • Physics
    Physical review. B, Condensed matter
  • 1996
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