Observability for the Schr\"odinger Equation: an Optimal Transport Approach.

We establish an observation inequality for the Schr\"odinger equation on $\mathbf{R}^d$, uniform in the Planck constant $\hbar\in[0,1]$. The proof is based on the pseudometric introduced in [F. Golse, T. Paul, Arch. Rational Mech. Anal. 223 (2017), 57-94]. This inequality involves only effective constants which are computed explicitly in their dependence in $\hbar$ and all parameters involved.