Journal
PHYSICAL REVIEW A
Volume 69, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.69.022313
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We describe a broad dynamical-algebraic framework for analyzing the quantum control properties of a set of naturally available interactions. General conditions under which universal control is achieved over a set of subspaces/subsystems are found in terms of the representation theory of the group U-A of allowed quantum evolutions. In some cases universal control can be achieved in all the state-space sectors carrying an irreducible action of U-A. All known physical examples of universal control on subspaces/systems are related to the framework developed here. Implications for quantum-information processing are discussed.
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