Spacetime Neural Network for High Dimensional Quantum Dynamics

We develop a spacetime neural network method with second order optimization for solving quantum dynamics from the high dimensional Schr"odinger equation. In contrast to the standard iterative first order optimization and the time-dependent variational principle, our approach utilizes the implicit mid-point method and generates the solution for all spatial and temporal values simultaneously after optimization. We demonstrate the method in the Schr"odinger equation with a self-normalized autoregressive spacetime neural network construction. Future explorations for solving different high dimensional differential equations are discussed.