In the paper the list of authors was incomplete. As a mere management drawback, two coauthors (Luigi Baggi and Michele Di Girolamo) were missing from the paper. They have greatly contributed to the conception of the scientific framework that is posed within the paper, and they have widely contributed to the novel results proposed in the paper. They also oversaw the whole paper. The corrected list, order, and affiliations of authors are indicated in this erratum.