Quantum stochastic Weyl operators

The quantum stochastic differential equation satisfied by the unitary operator U(t) = e/sup iE(t)/ with E(t) = /spl lambda/t + z B/sub t//sup -/ + z~ B/sub t//sup +/ + k M/sub t/, where B/sub t//sup -/, B/sub t//sup +/, and M/sub t/ are the square of white noise processes, is obtained in the module form.