deletions | additions       diff --git a/Complex DFT.tex b/Complex DFT.tex  index ece9d96..5316b45 100644  --- a/Complex DFT.tex  +++ b/Complex DFT.tex 
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Fig.~\ref{fig:cs-ionization-He} shows calculated ionization rates for the He~1$s$~state in a  uniform Stark-type electric field as a function of field strength.  In the limit of weak electric fields, the simple approximation  by Ammosov, Delone and Krainov~\cite{adk}, Krainov (ADK)~\cite{adk},  which depends only on the ionization potential, approaches the accurate reference calculation  by Scrinzi and co-workers~\cite{PhysRevLett.83.706}.  This demonstrates that the ionization rate is determined largely by the