Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Controlled Quantum Dense Coding in a Four-particle Non-maximally
  Entangled State via Local Measurements   A controlled quantum dense coding scheme is investigated with a four-particle
non-maximal quantum channel. The amount of classical information is shown to be
capable of being controlled by the controllers through adjustments of the local
measurement angles and to depend on the coefficients of the quantum channel; in
addition, the four particles are distributed in two inverse ways in such an
quantum channel. A restricted condition for distributing the particles to
realize quantum dense coding in an arbitrary ($N+2$)-particle quantum channel
is proposed.

30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
12
The categories of this paper are: nucl-th
31
The categories of this paper are: ao-sci
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The categories of this paper are: q-fin
3
The categories of this paper are: physics
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an