Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On The Influence of Two Parallel Plates on Atomic Levels   This paper is devoted to the study of the influence of two parallel plates on
the atomic levels of a Hydrogen atom placed in the region between the plates.
We treat two situations, namely: the case where both plates are infinitely
permeable and the case where one of them is a perfectly conducting plate and
the other, an infinitely permeable one. We compare our result with those found
in literature for two parallel conducting plates. The limiting cases where the
atom is near a conducting plate and near a permeable one are also taken.

3
The categories of this paper are: physics
35
The categories of this paper are: mtrl-th
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
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
23
The categories of this paper are: solv-int
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org