Title :
Simple experimental generation of a four-photon cluster state and distinguishing classes of genuine four-qubit entanglement using witness operators
Author :
Tokunaga, Yuuki ; Kuwashiro, Shin ; Yamamoto, Takashi ; Koashi, Masato ; Imoto, Nobuyuki
Author_Institution :
NTT Information Sharing Platform Laboratories, NTT Corporation, 1-1 Hikari-no-oka, Yokosuka, Kanagawa 239-0847, Japan
Abstract :
We experimentally demonstrate a simple scheme for generating a four-photon cluster state. We show that the produced state has genuine four-qubit entanglement which is discriminated from a class including GHZ and W types of entanglement.
Keywords :
Electronic mail; Laboratories; Optical pulses; Optical retarders; Photonic crystals; Physics; Polarization; Quantum computing; Quantum entanglement; Space vector pulse width modulation;
Conference_Titel :
Quantum Electronics and Laser Science Conference, 2007. QELS '07
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
978-1-55752-834-6
DOI :
10.1109/QELS.2007.4431704
