Abstract
Using the method of complex scaling we show that scattering resonances of \( - \Delta + V \), \( V \in L^\infty _\mathrm{{c}} ( {\mathbb {R}}^n ) \), are limits of eigenvalues of \( - \Delta + V - i \varepsilon x^2 \) as \( \varepsilon \rightarrow 0+\). That justifies a method proposed in computational chemistry and reflects a general principle for resonances in other settings.
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Acknowledgements
The author would like to thank Mike Christ, Semyon Dyatlov, Jeff Galkowski, John Strain and Joe Viola for helpful discussions. I am also grateful to the anonymous referee for the careful reading of the first version and for the valuable comments. This project was supported in part by the National Science Foundation grant DMS-1201417.
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Zworski, M. (2018). Scattering Resonances as Viscosity Limits. In: Hitrik, M., Tamarkin, D., Tsygan, B., Zelditch, S. (eds) Algebraic and Analytic Microlocal Analysis. AAMA 2013. Springer Proceedings in Mathematics & Statistics, vol 269. Springer, Cham. https://doi.org/10.1007/978-3-030-01588-6_14
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