Indirect control of quantum systems via an accessor: pure coherent control without system excitation
H. C. Fu, Hui Dong, X F Liu, C. P. Sun · Journal of Physics A Mathematical and Theoretical · 2008
A pure indirect control of quantum systems via a quantum accessor is investigated. In this control scheme, we do not apply any external classical excitation fields on the controlled system and we control a quantum system via a quantum accessor and classical control fields control the accessor only. Complete controllability is investigated for arbitrary finite-dimensional quantum systems and exemplified by two- and three-dimensional systems. The scheme exhibits some advantages; it uses less qubits in the accessor and does not depend on the energy-level structure of the controlled system.