  A notion of quantum multipole (in particular, dipole) noise is considered.
Quantum dipole noise is an analogue of quantum white noise but it acts in a
Fock space with indefinite metric. Quantum {\it white} noise describes the
leading term in the stochastic limit approximation to quantum dynamics while
quantum {\it multipole} noise describes the corrections to the leading term. We
obtain and study the generalized quantum stochastic equations describing
corrections to the stochastic limit which include quantum dipole noise.
