Prefer a chat interface with context about you and your work?
Sign problem in full configuration interaction quantum Monte Carlo: Linear and sublinear representation regimes for the exact wave function
We investigate the sign problem for full configuration interaction quantum Monte Carlo (FCIQMC), a stochastic algorithm for finding the ground state solution of the Schr\"odinger equation with substantially reduced computational cost compared with exact diagonalisation. We find $k$-space Hubbard models for which the solution is yielded with storage that grows …