The generation of an entangled four-photon state from two pairs of entangled two-photon states by using linear optical elements

Details The generation of an entangled four-photon state from two pairs of entangled two-photon states by using linear optical elements The generation of an entangled four-photon state from two pairs of entangled two-photon states by using linear optical elements

2001-11-02

arxiv.org/abs/quant-ph/0111014v2

Physics

Quantum Physics

4 pages 2 figure

Scientific paper

We present a scheme to produce an entangled four-photon state from two pairs of entangled two-photon states. Such entangled four-photon states are equivalent to the quantum state of two maximally entangled spin-1 particles. The scheme can also be generated to prepare an entangled 2N-photon state from N pairs of entangled two-photon states. Such multi-photon states play a crucial role in fundamental tests of quantum mechanics versus local realism and in many quantum information and quantum computation schemes.

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