Hybrid Auxiliary Field Quantum Monte Carlo for molecular systems

We propose a quantum Monte Carlo approach to solve the ground state many-body Schrodinger equation for the electronic ground state. The method combines optimization from variational Monte Carlo and propagation from auxiliary field quantum Monte Carlo. It gives highly accurate results in molecular test cases, before the fermionic sign problem sets in. We obtain uniform accuracy for configurations near and far from equilibrium, that are dominated by dynamic and static correlations, respectively.