MEASUREMENTS ON TRAPPED LASER-COOLED IONS USING QUANTUM COMPUTATIONS

There are some interesting connections between the theory of quantum c omputation and quantum measurement. As an illustration, we present a s cheme in which an ion trap quantum computer can be used to make arbitr arily accurate measurements of the quadrature phase variables for the collective vibrational motion of the ion. We also discuss some more ge neral aspects of quantum computation and measurement in terms of the F eynman-Deutsch principle.