Erratum: Non canonical polarizations of gravitational waves

Erratum: Eur. Phys. J. C (2023) 83:310 https://doi.org/10.1140/epjc/s10052-023-11502-1

In the original article, a misprint has been introduced in Eq. (3).

The correct equation reads as follows:

$$\begin{aligned} {h}^{0\mu }=0,\quad {h^{i}}_{i}=0,\quad \partial ^{j}h_{ij}=0, \end{aligned}$$

(3)

The original article has been corrected.