A simple quantum superfield generating equation of the field-antifieldformalism is proposed. The Schroedinger equation with the Hamiltonian having$Delta$-exact form is derived. An $Sp(2)$ symmetric extension to the mainconstruction, with specific features caused by the principal fact that allbasic equations become $Sp(2)$ vector-valued ones, is presented. A principalrole of quantum antibrackets in formulation of the Heisenberg equations ofmotion is shown.
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