Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Optimal Control of Quantum Systems and a Generalized Level Set Method   We study the application of a generalized form of the level set method used
in classical physical contexts to quantum optimal control situations. The set
of OCT equations needed to keep the expectation value of an observable constant
is first discussed and the dimensionality of the actual parameter space
carefully considered. Then we see how concepts of level set methods emerge that
may help solve the inverse problem associated with designing the control
Hamiltonian with greater speed. The formal equations and the algorithm are
presented.

6
The categories of this paper are: astro-ph
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
4
The categories of this paper are: cond-mat
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin