Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Indirect control with quantum accessor (I): coherent control of
  multi-level system via qubit chain   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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The categories of this paper are: plasm-ph
4
The categories of this paper are: cond-mat
19
The categories of this paper are: eess
2
The categories of this paper are: math
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
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The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
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The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
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The categories of this paper are: ao-sci