1 Correction to: Eur. Phys. J. Plus (2021) 136:542 https://doi.org/10.1140/epjp/s13360-021-01559-w

In the original version of this paper the corresponding author was assigned incorrectly.

The correct corresponding author is:

P. Muthukumar

The original article has been corrected. We apologise for any inconvenience caused to our readers.