Numerical Simulations of an Electron-Exciton System

Using fermion Monte Carlo techniques we have studied the properties of a one-dimensional electron-exciton system. The zero frequency wave vector charge-density, spin-density and pairing susceptibilities were evaluated for a variety of band fillings and interaction parameters. We find that retardation and band filling are essential in determining which correlations are dominant at low temperature. While for a single chain it is possible in the strong coupling regime to have pairing correlations diverge more rapidly than charge density wave correlations, we argue that interchain couplings will lead to a 3-D charge density wave phase.