Experimental Entanglement of a Six-Photon Symmetric Dicke State

2009/03/31 by Witlef Wieczorek, Roland Krischek, Nikolai Kiesel +4 · 5 citations
Computer Science · Mathematics · Physics and Astronomy · #Entanglement witness #Mathematics #Multipartite #Multipartite entanglement #Photon #Photon entanglement #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum entanglement #Quantum mechanics #Qubit #Squashed entanglement #State (computer science) #W state #quant-ph

paper · pdf · doi:10.1103/physrevlett.103.020504

published as Phys. Rev. Lett. 103, 020504 (2009) · replaced with published version

openalex publication_date 2009/07/10 · arxiv created 2009/07/16 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We report on the experimental observation and characterization of a six-photon entangled Dicke state. We obtain a fidelity as high as 0.654+/-0.024 and prove genuine six-photon entanglement by, amongst others, a two-setting witness yielding -0.422+/-0.148. This state has remarkable properties; e.g., it allows obtaining inequivalent entangled states of a lower qubit number via projective measurements, and it possesses a high entanglement persistency against qubit loss. We characterize the properties of the six-photon Dicke state experimentally by detecting and analyzing the entanglement of a variety of multipartite entangled states.

Citations

• Three qubits can be entangled in two inequivalent ways
• Detecting Genuine Multipartite Entanglement with Two Local Measurements
• From Bell’s Theorem to Secure Quantum Key Distribution
• Experimental Observation of Four-Photon Entangled Dicke State with High Fidelity
• Quantum secret sharing
• Generation of Symmetric Dicke States of Remote Qubits with Linear Optics
• Toolbox for entanglement detection and fidelity estimation
• Scalable multi-particle entanglement of trapped ions
• On the Einstein Podolsky Rosen paradox
• Experimental entanglement of six photons in graph states
• Multiqubit entanglement engineering via projective measurements

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