Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Weak-Coupling-Like Time Evolution of Driven Four-Level Systems in the
  Strong-Coupling Regime   It is shown analytically that there exists a natural basis in terms of which
the nonperturbative time evolution of an important class of driven four-level
systems in the strong-coupling regime decouples and essentially reduces to the
corresponding time evolution in the weak-field regime, exhibiting simple Rabi
oscillations between the different relevant quantum states. The predictions of
the model are corroborated by an exact numerical calculation.

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The categories of this paper are: plasm-ph
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The categories of this paper are: solv-int
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The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
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The categories of this paper are: ao-sci
2
The categories of this paper are: math
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
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The categories of this paper are: dg-ga
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The categories of this paper are: math-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: hep-ex
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The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th