%0 Generic %1 li2019experimental %A Li, Zheng-Da %A Zhang, Rui %A Yin, Xu-Fei %A Liu, Li-Zheng %A Hu, Yi %A Fang, Yu-Qiang %A Fei, Yue-Yang %A Jiang, Xiao %A Zhang, Jun %A Li, Li %A Liu, Nai-Le %A Xu, Feihu %A Chen, Yu-Ao %A Pan, Jian-Wei %D 2019 %K Experimental %R 10.1038/s41566-019-0468-5 %T Experimental quantum repeater without quantum memory %U http://arxiv.org/abs/1908.05351 %X Quantum repeaters -- important components of a scalable quantum internet -- enable the entanglement to be distributed over long distances. The standard paradigm for a quantum repeater relies on a necessary demanding requirement of quantum memory. Despite significant progress, the limited performance of quantum memory makes practical quantum repeaters still a great challenge. Remarkably, a proposed all-photonic quantum repeater avoids the need for quantum memory by harnessing the graph states in the repeater nodes. Here we perform an experimental demonstration of an all-photonic quantum repeater using linear optics. By manipulating a 12-photon interferometer, we implement a 2-by-2 parallel all-photonic quantum repeater, and observe an 89% enhancement of entanglement-generation rate over the standard parallel entanglement swapping. These results open a new way towards designing repeaters with efficient single-photon sources and photonic graph states, and suggest that the all-photonic scheme represents an alternative path -- parallel to that of matter-memory-based schemes -- towards realizing practical quantum repeaters.

@misc{li2019experimental, abstract = {Quantum repeaters -- important components of a scalable quantum internet -- enable the entanglement to be distributed over long distances. The standard paradigm for a quantum repeater relies on a necessary demanding requirement of quantum memory. Despite significant progress, the limited performance of quantum memory makes practical quantum repeaters still a great challenge. Remarkably, a proposed all-photonic quantum repeater avoids the need for quantum memory by harnessing the graph states in the repeater nodes. Here we perform an experimental demonstration of an all-photonic quantum repeater using linear optics. By manipulating a 12-photon interferometer, we implement a 2-by-2 parallel all-photonic quantum repeater, and observe an 89% enhancement of entanglement-generation rate over the standard parallel entanglement swapping. These results open a new way towards designing repeaters with efficient single-photon sources and photonic graph states, and suggest that the all-photonic scheme represents an alternative path -- parallel to that of matter-memory-based schemes -- towards realizing practical quantum repeaters.}, added-at = {2019-09-11T17:22:26.000+0200}, author = {Li, Zheng-Da and Zhang, Rui and Yin, Xu-Fei and Liu, Li-Zheng and Hu, Yi and Fang, Yu-Qiang and Fei, Yue-Yang and Jiang, Xiao and Zhang, Jun and Li, Li and Liu, Nai-Le and Xu, Feihu and Chen, Yu-Ao and Pan, Jian-Wei}, biburl = {https://www.bibsonomy.org/bibtex/2dab6beef405c30e52362a1e0f05c4f2f/annapappa}, description = {Experimental quantum repeater without quantum memory}, doi = {10.1038/s41566-019-0468-5}, interhash = {ed638ef4057af0d7981992b16b267ad3}, intrahash = {dab6beef405c30e52362a1e0f05c4f2f}, keywords = {Experimental}, note = {cite arxiv:1908.05351Comment: Published online in Nature Photonics}, timestamp = {2019-09-11T17:22:26.000+0200}, title = {Experimental quantum repeater without quantum memory}, url = {http://arxiv.org/abs/1908.05351}, year = 2019 }