Dispersive estimates for Schrödinger operators in dimension two with obstructions at zero energy
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Abstract:
We investigate $L^1(\mathbb {R}^2)\to L^\infty (\mathbb {R}^2)$ dispersive estimates for the Schrödinger operator $H=-\Delta +V$ when there are obstructions, resonances or an eigenvalue, at zero energy. In particular, we show that the existence of an s-wave resonance at zero energy does not destroy the $t^{-1}$ decay rate. We also show that if there is a p-wave resonance or an eigenvalue at zero energy, then there is a time dependent operator $F_t$ satisfying $\|F_t\|_{L^1\to L^\infty } \lesssim 1$ such that \[ \|e^{itH}P_{ac}-F_t\|_{L^1\to L^\infty } \lesssim |t|^{-1}, \text { for } |t|>1.\] We also establish a weighted dispersive estimate with $t^{-1}$ decay rate in the case when there is an eigenvalue at zero energy but no resonances.References
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Additional Information
- M. Burak Erdoğan
- Affiliation: Department of Mathematics, University of Illinois, Urbana, Illinois 61801
- Email: berdogan@math.uiuc.edu
- William R. Green
- Affiliation: Department of Mathematics and Computer Science, Eastern Illinois University, Charleston, Illinois 61920
- Address at time of publication: Department of Mathematics, Rose-Hulman Institute of Technology, Terre Haute, Indiana 47803
- MR Author ID: 906481
- ORCID: 0000-0001-9399-8380
- Email: wrgreen2@eiu.edu, green@rose-hulman.edu
- Received by editor(s): January 11, 2012
- Received by editor(s) in revised form: April 19, 2012
- Published electronically: April 18, 2013
- Additional Notes: The first author was partially supported by NSF grant DMS-0900865.
- © Copyright 2013
American Mathematical Society
The copyright for this article reverts to public domain 28 years after publication. - Journal: Trans. Amer. Math. Soc. 365 (2013), 6403-6440
- MSC (2010): Primary 35J10
- DOI: https://doi.org/10.1090/S0002-9947-2013-05861-8
- MathSciNet review: 3105757