CREATION OPERATOR FOR SPINONS IN ONE-DIMENSION

We propose a definition for a creation operator for the spinon, the fr actional statistics elementary excitation of the Haldane-Shastry model , and give numerical and analytical evidence that our operator creates a single spinon with nearly unit amplitude in the Heisenberg model wi th inverse squared exchange. We then discuss how the operator is usefu l in more general contexts such as studying the underlying spinons of other spin-chain models, like the XXX and XY model, and of the one-dim ensional Hubbard model.