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Calculating Resonances Using a Complex Absorbing Potential

By Robin Santra

Argonne National Laboratory

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The Siegert (or Gamow) wave function associated with a resonance state is exponentially divergent at large distances from the scattering target. A complex absorbing potential (CAP) provides a computationally simple and efficient technique for calculating the complex Siegert energy of a resonance within a square-integrable basis. Some aspects of the associated complex symmetric eigenvalue problem will be addressed. Applications to the decay of inner-shell holes, to elastic electron-molecule scattering, and to multiphoton processes will be described.


Robin Santra
Physicist, Atomic, Molecular & Optical Physics
Chemistry Division
Argonne National Laboratory

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Researchers should cite this work as follows:

  • Robin Santra (2008), "Calculating Resonances Using a Complex Absorbing Potential,"

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Northwestern University, Evanston, IL


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Northwestern University

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