COHERENT-STATE WAVE-FUNCTION FOR SPIN-DEPENDENT SYSTEMS

We propose a new variational wavefunction to describe spin-dependent s ystems. Spin coherent states are used to represent the spin state of p articles. Since states are parameterized by a continuous variable, cor relation operators can be represented as simple integrals over c-value d functions. These integrals are simulated using standard Monte Carlo techniques. We present a general N-particle wavefunction written in th e coherent state basis. Explicit Monte Carlo calculations on liquid He -3 using this wavefunction give very good agreement with standard meth ods.