Type: Article
Publication Date: 1978-07-10
Citations: 151
DOI: https://doi.org/10.1103/physrevlett.41.67
We extend the rigorous theory of complex scaling to atoms in constant electric field. This allows one to give a precise mathematical definition of resonance and leads to several results about the perturbation series: Borel summability at nonreal field and a relation between the asymptotics of the perturbation coefficients for large $n$ and the width of the resonance for small field.