COHERENT-STATE WAVE-FUNCTION FOR SYSTEMS WITH SPIN-DEPENDENT CORRELATIONS

We propose a variational wave function which uses coherent states to r epresent the spin state of particles, and describes systems with spin- dependent correlations. Spin states are parametrized by a continuous v ariable that looks like a classical spin vector. Correlation operators are represented as simple integrals, without commutator terms, which can be evaluated using standard or Monte Carlo techniques. Explicit ca lculations on liquid He-3 using our wave function give good agreement with standard methods. Applications to systems in condensed matter and nuclear physics are discussed.