Geodesic
Dispersion for 1-D Schrödinger and wave equations with BV coefficients
Annales de l'I.H.P. Analyse non linéaire, Tome 33 (2016) no. 6, pp. 1473-1495
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In this paper we analyze the dispersion for one dimensional wave and Schrödinger equations with BV coefficients. In the case of the wave equation we give a complete answer in terms of the variation of the logarithm of the coefficient showing that dispersion occurs if this variation is small enough but it may fail when the variation goes beyond a sharp threshold. For the Schrödinger equation we prove that the dispersion holds under the same smallness assumption on the variation of the coefficient. But, whether dispersion may fail for larger coefficients is unknown for the Schrödinger equation.

DOI : 10.1016/j.anihpc.2015.06.002
Keywords: Schrödinger equation, Wave equation, One space dimension, BV coefficients, Dispersion and Strichartz estimates, Almost periodic functions 
@article{AIHPC_2016__33_6_1473_0,
     author = {Beli, Constantin N. and Ignat, Liviu I. and Zuazua, Enrique},
     title = {Dispersion for {1-D} {Schr\"odinger} and wave equations with {BV} coefficients},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {1473--1495},
     year = {2016},
     publisher = {Elsevier},
     volume = {33},
     number = {6},
     doi = {10.1016/j.anihpc.2015.06.002},
     zbl = {1364.35024},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1016/j.anihpc.2015.06.002/}
}
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Beli, Constantin N.; Ignat, Liviu I.; Zuazua, Enrique. Dispersion for 1-D Schrödinger and wave equations with BV coefficients. Annales de l'I.H.P. Analyse non linéaire, Tome 33 (2016) no. 6, pp. 1473-1495. doi: 10.1016/j.anihpc.2015.06.002

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