Experimental Entanglement and Nonlocality of a Two-Photon Six-Qubit Cluster State

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Ceccarelli, Raino
Vallone, Giuseppe
De Martini, Francesco
Mataloni, Paolo
Cabello, Adan
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Abstract
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We create a six-qubit linear cluster state by transforming a two-photon hyperentangled state in which three qubits are encoded in each particle, one in the polarization and two in the linear momentum degrees of freedom. For this state, we demonstrate genuine six-qubit entanglement, persistency of entanglement against the loss of qubits, and higher violation than in previous experiments on Bell inequalities of the Mermin type.
Comment: 4 pages, revtex, published version
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Quantum Physics
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