Noncommutative sharp Hausdorff-Young inequality

Abstract: We prove the sharp Hausdorff--Young inequality on the quantum Euclidean space. Meanwhile, our result implies the sharp Hausdorff-Young constants for the Weyl transform, as well as that for the Heisenberg group. The key ingredient is a novel operator-valued flow related to the Gabor transform. Our method is mainly based on operator calculus and hence generally applicable to similar problems. Finally, we give the definition of noncommutative convolution and include the partial results for the sharp Young's inequality.