Correction to: Scientific Reports https://doi.org/10.1038/s41598-018-27122-9, published online 14 June 2018

This Article contains an error in Equation 3.

$$\Theta =\arctan (\sqrt{\frac{1-{\langle \beta \rangle }_{{t}_{{\rm{break}}}}^{2}}{{\langle \beta \rangle }_{{t}_{{\rm{break}}}}}})\simeq {\langle |{\theta }_{\gamma }|\rangle }_{t\ge {t}_{{\rm{break}}}}$$

should read:

$$\Theta =\arctan (\frac{\sqrt{1-{\langle \beta \rangle }_{{t}_{{\rm{break}}}}^{2}}}{{\langle \beta \rangle }_{{t}_{{\rm{break}}}}})\simeq {\langle |{\theta }_{\gamma }|\rangle }_{t\ge {t}_{{\rm{break}}}}$$