https://doi.org/10.1140/epjp/s13360-022-02377-4
Comment
Comments on “Elegant scheme for one-way wave propagation in Kerr media”
College of Robotics Engineering, Yangtze Normal University, 408100, Chongqing, People’s Republic of China
Received:
30
January
2021
Accepted:
11
January
2022
Published online:
28
February
2022
We present some comments on the paper [N. A. Khan, et al., Eur. Phys. J. Plus (2020) 135:200]. We consider the linearization of 
applied to the Laplace transform of the Caputo derivative. Inverting this expression back to the time domain, we find that this procedure approximates the Caputo derivative with a combination of integer-order quantities, which is a severely questionable result. Further, high precision in complex frequency (i.e., Laplace) domain does not imply an high precision in the time domain. We provide some counterexamples in support of our analysis.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2022
