On the Fourier expansion method for highly accurate computation of the   Voigt/complex error function in a rapid algorithm
  In our recent publication [1] we presented an exponential series approximation suitable for highly accurate computation of the complex error function in a rapid algorithm. In this Short Communication we describe how a simplified representation of the proposed complex error function approximation makes possible further algorithmic optimization resulting in a considerable computational acceleration without compromise on accuracy. 
S. M. Abrarov, B. M. Quine
math.NA cs.NA