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A posteriori error estimation for the non-self-consistent Kohn-Sham equations

Michael F. Herbst 1, 2 Antoine Levitt 1, 2 Eric Cancès 1, 2
2 MATHERIALS - MATHematics for MatERIALS
CERMICS - Centre d'Enseignement et de Recherche en Mathématiques et Calcul Scientifique, Inria de Paris
Abstract : We address the problem of bounding rigorously the errors in the numerical solution of the Kohn-Sham equations due to (i) the finiteness of the basis set, (ii) the convergence thresholds in iterative procedures, (iii) the propagation of rounding errors in floating-point arithmetic. In this contribution, we compute fully-guaranteed bounds on the solution of the non-self-consistent equations in the pseudopotential approximation in a plane-wave basis set. We demonstrate our methodology by providing band structure diagrams of silicon annotated with error bars indicating the combined error.
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https://hal.archives-ouvertes.fr/hal-02557871
Contributor : Michael Herbst <>
Submitted on : Wednesday, April 29, 2020 - 9:01:31 AM
Last modification on : Thursday, April 30, 2020 - 1:37:55 AM

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  • HAL Id : hal-02557871, version 1
  • ARXIV : 2004.13549

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Michael F. Herbst, Antoine Levitt, Eric Cancès. A posteriori error estimation for the non-self-consistent Kohn-Sham equations. 2020. ⟨hal-02557871⟩

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