Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Search for tunnelling centres in Lennard-Jones clusters   We report on numerical procedures for, and preliminary results on the search
for, tunnelling centres in Lennard-Jones clusters, seen as simple model systems
of glasses. Several of the double-well potentials identified are good
candidates to give rise to two-level systems. The role of boundary effects, and
the application of the semiclassical WKB approximation in multidimensional
spaces for the calculation of the ground state splitting are discussed.

13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin