ON THE MEASUREMENT OF SUPERPOSITIONS OF CHIRAL AMPLITUDES BY POLARIZED-LIGHT SCATTERING

We show that no experiment involving parity can measure the left-right coherence of a state \psi=a(L)\L]+e(i phi)a(R)\R] if sin phi is zero and \L] and \R] are real mirror images of one another. We then exhibit a number of experiments in elastic linear light scattering which provide all-or-none measurements of left-right coherence.