Realization of an Optimally Distinguishable Multi-photon Quantum Superposition

Details Realization of an Optimally Distinguishable Multi-photon Quantum Superposition Realization of an Optimally Distinguishable Multi-photon Quantum Superposition

2004-10-27

arxiv.org/abs/quant-ph/0410225v2

Physics

Quantum Physics

10 pages, 2 figures

Scientific paper

We report the successful generation of an entangled multiparticle quantum superposition of pure photon states. They result from a multiple (universal} cloning of a single photon qubit by a high gain, quantum-injected parametric amplifier. The information preserving property of the process suggests for these states the name of ''multi-particle qubits''. They are ideal objects for investigating the emergence of the classical world in quantum systems with increasing complexity, the decoherence processes and may allow the practical implementation of the universal 2-qubit logic gates.

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