Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum Effects in Matter-Wave Diffraction   Advances in micro-technology of the last years have made it possible to carry
optics textbooks experiments over to atomic and molecular beams, such as
diffraction by a double slit or transmission grating. The usual wave-optical
approach gives a good qualitative description of these experiments. However,
small deviations therefrom and sophisticated quantum mechanics yield new
surprising insights on the size of particles and on their interaction with
surfaces.

25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio