Gaussian repeater chains using only Gaussian operations and homodyne detection cannot beat direct transmission for the quantum capacity of pure-loss bosonic channels.
Gaussian quantum channels
1 Pith paper cite this work. Polarity classification is still indexing.
1
Pith paper citing it
abstract
This article provides an elementary introduction to Gaussian channels and their capacities. We review results on the classical, quantum, and entanglement assisted capacities and discuss related entropic quantities as well as additivity issues. Some of the known results are extended. In particular, it is shown that the quantum conditional entropy is maximized by Gaussian states and that some implications for additivity problems can be extended to the Gaussian setting.
fields
quant-ph 1years
2026 1verdicts
UNVERDICTED 1representative citing papers
citing papers explorer
-
No-Go Theorem for Gaussian Quantum Repeaters from Fractional Extendibility
Gaussian repeater chains using only Gaussian operations and homodyne detection cannot beat direct transmission for the quantum capacity of pure-loss bosonic channels.