Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Strongly confined fluids: Diverging time scales and slowing down of
  equilibration   The Newtonian dynamics of strongly confined fluids exhibits a rich behavior.
Its confined and unconfined degrees of freedom decouple for confinement length
$L \to 0$. In that case and for a slit geometry the intermediate scattering
functions $S_{\mu\nu}(q,t)$ simplify, resulting for $(\mu,\nu) \neq (0,0)$ in a
Knudsen-gas like behavior of the confined degrees of freedom, and otherwise in
$S_{\parallel}(q,t)$, describing the structural relaxation of the unconfined
ones. Taking the coupling into account we prove that the energy fluctuations
relax exponentially. For smooth potentials the relaxation times diverge as
$L^{-3}$ and $L^{-4}$, respectively, for the confined and unconfined degrees of
freedom. The strength of the $L^{-3}$ divergence can be calculated
analytically. It depends on the pair potential and the two-dimensional pair
distribution function. Experimental setups are suggested to test these
predictions.

19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
1
The categories of this paper are: cs
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg