In this paper is presented an abstract theory of quantum processors and
controllers, special kind of quantum computational network defined on a
composite quantum system with two parts: the controlling and controlled
subsystems. Such approach formally differs from consideration of quantum
control as some external influence on a system using some set of Hamiltonians
or quantum gates. The model of programmed quantum controllers discussed in
present paper is based on theory of universal deterministic quantum processors
(programmable gate arrays). Such quantum devices may simulate arbitrary
evolution of quantum system and so demonstrate an example of universal quantum
control.
Keywords: Quantum, Computer, Control, Processor, UniversalComment: LaTeXe, 7 pp, 2 col, v3: revised and extended (+50%), PhysCon0