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Multiphoton entanglement and interferometry

delete2003-04-24
delete1
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OA
AI
M
Mohamed Bourennane
E
Ebil, M
S
Sascha Gaertner
N
Nikolai Kiesel
C
Christian Kurtsiefer
M
Marek Żukowski
H
Harald Weinfurter
DOI：10.1002/prop.200310039delete
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Abstract

Abstract

En 中文
Multiphoton entanglement is the basis of many quantum communication schemes, quantum cryptographic protocols, and fundamental tests of quantum theory. Spontaneous parametric down-conversion is the most effective source for polarization entangled photon pairs. Here we show, that a class of entangled 4-photon states can be directly created by parametric down-conversion. These states exhibit perfect quantum correlations and a high robustness of entanglement against photon loss. Therefore these states are well suited for new types of quantum communication.
Keywords:
QUANTUM CRYPTOGRAPHY
ENTANGLING PHOTONS
STATE
TIME
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Key information extracted from the uploaded paper, including a brief overview, abstract, background, key highlights, visual analysis, and future outlook.

Journal

F
Fortschritte der Physik-Progress of Physics
IF:
7.8
Papers:
2.0K
Citations:
3.6K

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