Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Unidimensional continuous-variable quantum key distribution using
  squeezed states   The possibility of using squeezed states in the recently suggested
unidimensional continuous-variable quantum key distribution based on a single
quadrature modulation is addressed. It is shown that squeezing of the signal
states expands the physicality bounds of the effective entangled state shared
between the trusted parties due to the antisqueezing noise in the unmodulated
quadrature. Modulation of the antisqueezed quadrature, on the other hand,
effectively shrinks the physicality bounds due to the squeezing in the
unmodulated quadrature and also provides noise on the reference side of the
protocol, thus limiting the possibility of eavesdropping in noisy channels.
This strategy is practical for low-loss (i.e., short-distance) channels,
especially if direct reconciliation scheme is applied.

7
The categories of this paper are: hep-th
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ
1
The categories of this paper are: cs
2
The categories of this paper are: math
9
The categories of this paper are: nlin