B.3 HEISENBERG Picture

Its time derivative may be combined with (B.3) to yield , which shows that is time-independent. Since an arbitrary matrix element in the SCHRÖDINGER picture can be written as

(B.11) |

a general operator in the HEISENBERG picture is given by

Equation (B.12) can be rewritten in terms of the interaction picture operators

or in terms of the operator derived in the next section