Quasi-invariance of Gaussian measures for the $3d$ energy critical nonlinear Schr\" odinger equation

We consider the $3d$ energy critical nonlinear Schr" odinger equation with data distributed according to the Gaussian measure with covariance operator $(1-\mathrm{\Delta }{)}^{-s}$, where $\mathrm{\Delta }$ is the Laplace operator and $s$ is sufficiently large. We prove that the flow sends full measure sets to full measure sets. We also discuss some simple applications. This extends a previous result by Planchon-Visciglia and the second author from $1d$ to higher dimensions.