Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Mesoscopic Fluctuations in Models of Classical and Quantum Diffusion   It is shown that the characteristics of the mesoscopic fluctuations in the
conventional quantum-diffusion model and the model of the non-coherent
(`classical') diffusion in media with long-range correlated disorder are quite
similar in the weak-disorder limit. The relative values of the variance and of
the high-order moments of the fluctuations in one model are obtained from those
in another one by substituting a proper weak-disorder parameter. As behaviour
of the ensemble-averaged diffusion coefficient is quite different in these
models, it suggests that the mesoscopic properties, including a possible
universality in the distribution functions, could be independent of the
behaviour of the averaged quantities.

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The categories of this paper are: q-bio
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The categories of this paper are: astro-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-lat
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The categories of this paper are: patt-sol
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The categories of this paper are: alg-geom
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The categories of this paper are: gr-qc
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The categories of this paper are: math-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: q-fin
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The categories of this paper are: hep-th
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The categories of this paper are: nucl-th
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The categories of this paper are: chem-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: supr-con
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The categories of this paper are: cmp-lg