Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fine Structure of the Rydberg Blockade Zone   A spatial structure of the zone blocked by the dipolar electric field of a
Rydberg atom is calculated taking into account a possibility of excitation to
the states with neighboring values of the principal quantum number. As a
result, it was found that the blocked zone represents a number of co-centric
spherical shells rather than a solid ball, and the respective pair correlation
function should have additional maxima at small interparticle distances.

19
The categories of this paper are: eess
0
The categories of this paper are: hep-ph
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol