| The present dissertation is mainly about experimental generation of narrow-band polarization-entangled photon sources and their applications in quantum information.We have further developed the multi-photon interference techniques into the regime of continuous wave. Through cavity-enhanced spontaneous parametric down-conversion, in this dissertation, we report for the first time the experimental realization of a narrow-band polarization-entangled photon source with a linewidth of 9.6MHz which is comparable to the typical linewidth of atomic ensemble-based quantum memories, of synchronization-free quantum teleportation and narrow-band three-photon entanglement, of deterministic narrow-band polarization-entangled photon source and narrow-band arbitrary non-maximally entangled pure states.The techniques developed in this dissertation would dramatically facilitate progresses in many important fields of scientific research, including long distance quantum communication, linear optics quantum computation and test of the foundation of quantum mechanics. |
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