Entanglement and interference between different degrees of freedom of photons states

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dc.creatorSun, F. W.
dc.creatorLiu, B. H.
dc.creatorHuang, Y. F.
dc.creatorZhang, Y. S.
dc.creatorOu, Z. Y.
dc.creatorGuo, G. C.
dc.date2007-04-17
dc.date2008-01-04
dc.date.accessioned2026-07-07T08:52:14Z
dc.date.available2026-07-07T08:52:14Z
dc.descriptionIn this paper, photonic entanglement and interference are described and analyzed with the language of quantum information process. Correspondingly, a photon state involving several degrees of freedom is represented in a new expression based on the permutation symmetry of bosons. In this expression, each degree of freedom of a single photon is regarded as a qubit and operations on photons as qubit gates. The two-photon Hong-Ou-Mandel interference is well interpreted with it. Moreover, the analysis reveals the entanglement between different degrees of freedom in a four-photon state from parametric down conversion, even if there is no entanglement between them in the two-photon state. The entanglement will decrease the state purity and photon interference visibility in the experiments on a four-photon polarization state.
dc.description11 pages and 2 figures
dc.identifierhttps://arxiv.org/abs/0704.2105
dc.identifierhttp://arxiv.org/abs/0704.2105
dc.identifierPHYSICAL REVIEW A 76, 063805 (2007)
dc.identifierdoi:10.1103/PhysRevA.76.063805
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/145213
dc.subjectQuantum Physics
dc.titleEntanglement and interference between different degrees of freedom of photons states
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