Indirect control with quantum accessor (I): coherent control of multi-level system via qubit chain

Details Indirect control with quantum accessor (I): coherent control of multi-level system via qubit chain Indirect control with quantum accessor (I): coherent control of multi-level system via qubit chain

2006-10-23

arxiv.org/abs/quant-ph/0610191v3

Physics

Quantum Physics

9 pages, 3 figures. To appear in Phys.Rev.A

Scientific paper

10.1103/PhysRevA.75.052317

Indirect controllability of an arbitrary finite dimensional quantum system (N-dimensional qudit) through a quantum accessor is investigated. Here, The qudit is coupled to a quantum accessor which is modeled as a fully controllable spin chain with nearest neighbor (anisotropic) XY-coupling. The complete controllability of such indirect control system is investigated in detail. The general approach is applied to the indirect controllability of two and three dimensional quantum systems. For two and three dimensional systems, a simpler indirect control scheme is also presented.

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