Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Finite-resource teleportation stretching for continuous-variable systems   We show how adaptive protocols of quantum and private communication through
bosonic Gaussian channels can be simplified into much easier block versions
that involve resource states with finite energy. This is achieved by combining
the adaptive-to-block reduction technique devised earlier [S. Pirandola et al.,
Nat. Commun. 8, 15043 (2017)], based on teleportation stretching and relative
entropy of entanglement, with an alternative simulation of Gaussian channels
recently introduced by Liuzzo-Scorpo et al. [Phys. Rev. Lett. 119, 120503
(2017)]. In this way, we derive weak converse upper bounds for the secret-key
capacity of phase-insensitive Gaussian channels, which approximate the optimal
limit for infinite energy. Our results apply to both point-to-point and
repeater-assisted private communications.

28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg