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19 July 2007 Two-photon four-qubit linear cluster states
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Abstract
High fidelity, high count rate four qubit linear cluster states have been realized by using two photons that are entangled both in polarization and linear momentum. Their properties have been investigated by evaluating the entanglement witness and carrying out a "stronger two observer all versus nothing" test of quantum nonlocality. The experimental results concerning the realization of single qubit rotations demonstrates the feasibility of one-way quantum computation by using these states.
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G. Vallone, E. Pomarico, F. De Martini, and P. Mataloni "Two-photon four-qubit linear cluster states", Proc. SPIE 6726, ICONO 2007: Physics of Intense and Superintense Laser Fields; Attosecond Pulses; Quantum and Atomic Optics; and Engineering of Quantum Information, 672629 (19 July 2007); https://doi.org/10.1117/12.751457
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