Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Surface relaxation of lyotropic lamellar phases   We study the relaxation modes of an interface between a lyotropic lamellar
phase and a gas or a simple liquid. The response is found to be qualitatively
different from those of both simple liquids and single-component smectic-A
liquid crystals. At low rates it is governed by a non-inertial, diffusive mode
whose decay rate increases quadratically with wavenumber, $|\omega|=Aq^2$. The
coefficient $A$ depends on the restoring forces of surface tension,
compressibility and bending, while the dissipation is dominated by the
so-called slip mechanism, i.e, relative motion of the two components of the
phase parallel to the lamellae. This surface mode has a large penetration depth
which, for sterically stabilised phases, is of order $(dq^2)^{-1}$, where $d$
is the microscopic lamellar spacing.

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The categories of this paper are: nucl-th
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The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
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The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
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The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
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The categories of this paper are: alg-geom
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The categories of this paper are: econ
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The categories of this paper are: cs
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The categories of this paper are: nucl-ex
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The categories of this paper are: chem-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-alg
2
The categories of this paper are: math