We introduce neutral excitation density-functional theory (XDFT), a computationally light, generally applicable, first-principles technique for calculating neutral electronic excitations. The concept ...

Understanding the real-time evolution of many-electron quantum systems is essential for studying dynamical properties in condensed matter, quantum chemistry, and complex materials, yet it poses a ...

Abstract: Variational methods are widely used in the meteorological community to retrieve 3-D wind from single light detection and ranging (LiDAR) observations, but the weights for loss function ...