Experimental quantum teleportation and multiphoton entanglement via interfering narrowband photon sources

Date: 2009-10-22
Authors Jian Yang, Xiao-Hui Bao, Han Zhang, Shuai Chen, Cheng-Zhi Peng, Zeng-Bing Chen and Jian-Wei Pan
Journal No. Phys. Rev. A 80, 042321 (2009)
Abstract In this paper, we report a realization of synchronization-free quantum teleportation and narrowband three-photon entanglement through interfering narrowband photon sources. Since both the single-photon and the entangled photon pair utilized are completely autonomous, it removes the requirement of high-demanding synchronization techniques in long-distance quantum communication with pulsed spontaneous parametric down-conversion sources. The frequency linewidth of the three-photon entanglement realized is on the order of several MHz, which matches the requirement of atomic ensemble based quantum memories. Such a narrowband multiphoton source will have applications in some advanced quantum communication protocols and linear optical quantum computation.