Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A superfluid hydrodynamic model for the enhanced moments of inertia of
  molecules in liquid 4He   We present a superfluid hydrodynamic model for the increase in moment of
inertia, $\Delta I$, of molecules rotating in liquid $^4$He. The static
inhomogeneous He density around each molecule (calculated using the Orsay-Paris
liquid $^4$He density functional) is assumed to adiabatically follow the
rotation of the molecule. We find that the $\Delta I$ values created by the
viscousless and irrotational flow are in good agreement with the observed
increases for several molecules [ OCS, (HCN)$_2$, HCCCN, and HCCCH$_3$ ]. For
HCN and HCCH, our model substantially overestimates $\Delta I$. This is likely
to result from a (partial) breakdown of the adiabatic following approximation.

1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
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The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
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The categories of this paper are: hep-th
5
The categories of this paper are: gr-qc