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A New Multiscale Discontinuous Galerkin Method for the One-Dimensional Stationary Schrödinger Equation

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Abstract

In this paper, we develop and analyze a new multiscale discontinuous Galerkin (DG) method for one-dimensional stationary Schrödinger equations with open boundary conditions which have highly oscillating solutions. Our method uses a smaller finite element space than the WKB local DG method proposed in Wang and Shu (J Comput Phys 218:295–323, 2006) while achieving the same order of accuracy with no resonance errors. We prove that the DG approximation converges optimally with respect to the mesh size \(h\) in \(L^2\) norm without the typical constraint that \(h\) has to be smaller than the wave length. Numerical experiments were carried out to verify the second order optimal convergence rate of the method and to demonstrate its ability to capture oscillating solutions on coarse meshes in the applications to Schrödinger equations.

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Acknowledgments

The authors consent to comply with all the Publication Ethical Standards. The research of the first author is supported by NSF Grant DMS-1419029. The research of the second author is supported by DOE Grant DE-FG02-08ER25863 and NSF Grant DMS-1418750. The research of the third author is supported by NSF Grant DMS-1418953.

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Authors and Affiliations

  1. Department of Mathematics, University of Massachusetts Dartmouth, North Dartmouth, MA, 02747, USA

    Bo Dong

  2. Division of Applied Mathematics, Brown University, Providence, RI, 02912, USA

    Chi-Wang Shu

  3. Department of Mathematics & Statistics, Florida International University, Miami, FL, 33199, USA

    Wei Wang

Authors
  1. Bo Dong
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  2. Chi-Wang Shu
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  3. Wei Wang
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Correspondence to Bo Dong.

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Dong, B., Shu, CW. & Wang, W. A New Multiscale Discontinuous Galerkin Method for the One-Dimensional Stationary Schrödinger Equation. J Sci Comput 66, 321–345 (2016). https://doi.org/10.1007/s10915-015-0022-7

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  • DOI: https://doi.org/10.1007/s10915-015-0022-7

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