Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Entanglement for a two-parameter class of states in $2\otimes n$ quantum
  system   We exhibit a two-parameter class of states $\rho_{(\alpha,\gamma)}$, in
$2\otimes n$ quantum system for $n\ge 3$, which can be obtained from an
arbitrary state by means of local quantum operations and classical
communication, and which are invariant under all bilateral %unitary operations
%of the form $U\otimes U$ on $2\otimes n$ quantum system. We calculate the
negativity of $\rho_{(\alpha,\gamma)}$, and a lower bound and a tight upper
bound on its entanglement of formation. It follows from this calculation that
the entanglement of formation of $\rho_{(\alpha,\gamma)}$ cannot exceed its
negativity.

22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ