Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comment on ``One-Step Synthesis of Multiatom Greenberger-Horne-Zeilinger
  States'' [Shi-Biao Zheng, Phys. Rev. Lett. 87, 230404 (2001)]   We point out the relation between the work of Zheng and ours, APS [G.S.
Agarwal, R.R. Puri, and R.P. Singh, Phys. Rev. A 56, 2249 (2001)] and show the
important connection between the atomic cat state and the GHZ states.

11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph