Efficient entanglement distillation without quantum memory
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F16%3A33159893" target="_blank" >RIV/61989592:15310/16:33159893 - isvavai.cz</a>
Result on the web
<a href="http://www.nature.com/articles/ncomms11720" target="_blank" >http://www.nature.com/articles/ncomms11720</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/ncomms11720" target="_blank" >10.1038/ncomms11720</a>
Alternative languages
Result language
angličtina
Original language name
Efficient entanglement distillation without quantum memory
Original language description
Entanglement distribution between distant parties is an essential component to most quantum communication protocols. Unfortunately, decoherence effects such as phase noise in optical fibres are known to demolish entanglement. Iterative (multistep) entanglement distillation protocols have long been proposed to overcome decoherence, but their probabilistic nature makes them inefficient since the success probability decays exponentially with the number of steps. Quantum memories have been contemplated to make entanglement distillation practical, but suitable quantum memories are not realised to date. Here, we present the theory for an efficient iterative entanglement distillation protocol without quantum memories and provide a proof-of-principle experimental demonstration. The scheme is applied to phase-diffused two-mode-squeezed states and proven to distil entanglement for up to three iteration steps. The data are indistinguishable from those that an efficient scheme using quantum memories would produce. Since our protocol includes the final measurement it is particularly promising for enhancing continuous-variable quantum key distribution.
Czech name
—
Czech description
—
Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BH - Optics, masers and lasers
OECD FORD branch
—
Result continuities
Project
<a href="/en/project/7E13032" target="_blank" >7E13032: Bright Squeezed Vacuum and its Applications</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Nature Communications
ISSN
2041-1723
e-ISSN
—
Volume of the periodical
7
Issue of the periodical within the volume
May
Country of publishing house
GB - UNITED KINGDOM
Number of pages
7
Pages from-to
"11720-1"-"11720-7"
UT code for WoS article
000376824200001
EID of the result in the Scopus database
—