Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Generation of entangled states for many multilevel atoms in a thermal
  cavity and ions in thermal motion   We propose a scheme for generating entangled states for two or more
multi-level atoms in a thermal cavity. The photon-number dependent parts in the
effective Hamiltonian are canceled with the assistant of a strong classical
field. Thus the scheme is insensitive to both the cavity decay and the thermal
field. The scheme does not require individual addressing of the atoms in the
cavity. The scheme can also be used to generate entangled states for many hot
multi-level ions.

22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess