Correction to: Communications Physics https://doi.org/10.1038/s42005-021-00749-3, published online 26 November 2021.

Due to a mistake occurred at typesetting, the originally published version of this article contained incorrect equations (3) to (6).

In equations (3) to (6) the indexes “+” and “g” associated with Σ were incorrectly placed at the top and bottom of the Σ symbol. The “1” to the top left of Σ  was also ambiguously placed too close to the arrow. In addition, the symbol Π in equation (6) was incorrectly written in its lower case form.

All four equations have now been corrected in the HTML and PDF version of the article.