Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Scattering of quantum wave packets by shallow potential islands: A
  quantum lens   We consider the problem of quantum scattering of a localized wave packet by a
weak Gaussian potential in two spatial dimensions. We show that, under certain
conditions, this problem bears close analogy with that of focusing (or
defocusing) of light rays by a thin optical lens: Quantum interference between
straight paths yields the same lens equation as for refracted rays in classical
optics.

4
The categories of this paper are: cond-mat
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas