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Efficient Application of the Voigt Functions in the Fourier Transform
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Efficient Application of the Voigt Functions in the Fourier Transform
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Journal Article
Efficient Application of the Voigt Functions in the Fourier Transform
2025
Overview
In this work, we develop a method for rational approximation of the Fourier transform (FT) based on the real and imaginary parts of the complex error function w(z)=e−z2(1−erf(−iz))=K(x,y)+iL(x,y), z=x+iy, where K(x,y) and L(x,y) are known as the Voigt and imaginary Voigt functions, respectively. In contrast to our previous rational approximation of the FT, the expansion coefficients in this method are not dependent on the values of a sampled function. As the values of the Voigt functions remain the same, this approach can be used for rapid computation with help of look-up tables. Mathematica codes with some examples are presented.
Publisher
MDPI AG
