Orthonormal Strichartz estimates on torus and waveguide manifold and applications

Abstract: We establish orthonormal Strichartz estimates for the fractional Schr\"odinger equations on torus and waveguide manifold. In the process, we also improve $\ell^2$ decoupling inequality and establish classical fractional Strichartz estimates on waveguide manifold. This maybe of independent interest. As an application, we establish local well-posednes for the Hartree equations with infinitely many particles with non-trace class initial data.