Absorption Measurements of Periodically Poled Potassium Titanyl Phosphate (PPKTP) at 775 nm and 1550 nm

Autor: Jessica Steinlechner, Stefan Ast, Christoph Krüger, Amrit Pal Singh, Tobias Eberle, Vitus Händchen, Roman Schnabel

Publikováno v: Sensors, Vol 13, Iss 1, Pp 565-573 (2013)

The efficient generation of second-harmonic light and squeezed light requires non-linear crystals that have low absorption at the fundamental and harmonic wavelengths. In this work the photo-thermal self-phase modulation technique is exploited to mea

Externí odkaz: https://doaj.org/article/0ba46243a8c946ab9c4722caa802e85f

Observation of one-way Einstein-Podolsky-Rosen steering

Autor: Vitus Händchen, Tobias Eberle, Aiko Samblowski, Sebastian Steinlechner, Reinhard F. Werner, Roman Schnabel, Torsten Franz

Publikováno v: Nature Photonics
Nature Photonics, 6(9), 596-599. Nature Publishing Group

The distinctive non-classical features of quantum physics were first discussed in the seminal paper by A. Einstein, B. Podolsky and N. Rosen (EPR) in 1935. In his immediate response E. Schr\"odinger introduced the notion of entanglement, now seen as

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1aad2634f343220102efbe5cecfdbb97
https://cris.maastrichtuniversity.nl/en/publications/15ea13ba-7b66-434e-8117-d1ea331e3165

Implementation of Quantum Key Distribution with Composable Security Against Coherent Attacks using Einstein-Podolsky-Rosen Entanglement

Autor: Roman Schnabel, Tobias Gehring, Torsten Franz, Reinhard F. Werner, Vitus Händchen, Christoph Pacher, Jörg Duhme, Fabian Furrer

Publikováno v: Nature Communications 6 (2015)
Nature Communications
Gehring, T, Haendchen, V, Duhme, J, Furrer, F, Franz, T, Pacher, C, Werner, R F & Schnabel, R 2015, ' Implementation of continuous-variable quantum key distribution with composable and one-sided-device-independent security against coherent attacks ', Nature Communications, vol. 6, 8795 . https://doi.org/10.1038/ncomms9795

Secret communication over public channels is one of the central pillars of a modern information society. Using quantum key distribution this is achieved without relying on the hardness of mathematical problems, which might be compromised by improved

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ac65df7a088244d6b57305df5c5fb500
http://www.repo.uni-hannover.de/handle/123456789/533

Stable control of 10 dB two-mode squeezed vacuum states of light

Autor: Vitus Händchen, T. Eberle, Roman Schnabel

Publikováno v: Optics Express

Continuous variable entanglement is a fundamental resource for many quantum information tasks. Important protocols like superactivation of zero-capacity channels and finite-size quantum cryptography that provides security against most general attacks

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e5c1ab2f381b3fe18fcce9fdf5608950
http://arxiv.org/abs/1305.3383

Experimental entanglement distribution by separable states

Autor: Daniela Schulze, Roman Schnabel, Christina E. Vollmer, Tobias Eberle, Jaromír Fiurášek, Vitus Händchen

Publikováno v: Physical Review Letters

The distribution of entanglement between macroscopically separated parties represents a crucial protocol for future quantum information networks. Surprisingly, it has been theoretically shown that two distant systems can be entangled by sending a thi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c91f8cfa9686bd78e9816dc55f2f1e5c
https://hdl.handle.net/11858/00-001M-0000-0015-117A-711858/00-001M-0000-0015-1176-F11858/00-001M-0000-0015-1179-9