Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum-Chaotic Evolution Reproduced from Effective Integrable
  Trajectories   Classically integrable approximants are here constructed for a family of
predominantly chaotic periodic systems by means of the Baker-Hausdorff-Campbell
formula. We compare the evolving wave density for the corresponding exact
quantum systems using semiclassical approximations based alternatively on the
chaotic and on the integrable trajectories. It is found that the latter
reproduce the quantum oscillations and provide superior approximations even
when the initial coherent state is placed in a broad chaotic region. Time
regimes are then accessed in which the propagation based on the system's exact
chaotic trajectories breaks down.

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The categories of this paper are: gr-qc
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The categories of this paper are: stat
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
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The categories of this paper are: supr-con
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The categories of this paper are: patt-sol
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The categories of this paper are: acc-phys
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The categories of this paper are: solv-int
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The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph
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The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: math-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: math