Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Deterministic secure quantum communication without maximally entangled
  states   Two deterministic secure quantum communication schemes are proposed, one
based on pure entangled states and the other on $d$-dimensional single-photon
states. In these two schemes, only single-photon measurements are required for
the two authorized users, which makes the schemes more convenient than others
in practical applications. Although each qubit can be read out after a
transmission of additional classical bit, it is unnecessary for the users to
transmit qubits double the distance between the sender and the receiver, which
will increase their bit rate and their security. The parties use decoy photons
to check eavesdropping efficiently. The obvious advantage in the first scheme
is that the pure entangled source is feasible with present techniques.

28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th