12-photon entanglement and scalable scattershot boson sampling with optimal entangled-photon pairs from parametric down-conversion

Autor: Han-Sen Zhong, Zhen Wang, Yuan Li, Yu-Ming He, Yi Hu, Xi-Lin Wang, Chao-Yang Lu, Yu-Ao Chen, Lu Zhang, Weijun Zhang, Hao Li, Zu-En Su, Jian-Wei Pan, Xiao Jiang, Lixing You, Xing Ding, Li Li, Li-Chao Peng, Wei Li, Nai-Le Liu
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Popis: Entangled photon sources with simultaneously near-unity heralding efficiency and indistinguishability are the fundamental elements for scalable photonic quantum technologies. We design and realize a degenerate entangled-photon source from an ultrafast pulsed laser pumped spontaneous parametric down-conversion (SPDC), which show simultaneously ~97% heralding efficiency and ~96% indistinguishability between independent single photons. Such a high-efficiency and frequency-uncorrelated SPDC source allows generation of the first 12-photon genuine entanglement with a state fidelity of 0.572(24). We further demonstrate a blueprint of scalable scattershot boson sampling using 12 SPDC sources and a 12*12-modes interferometer for three-, four-, and five-boson sampling, which yields count rates more than four orders of magnitudes higher than all previous SPDC experiments. Our work immediately enables high-efficiency implementations of multiplexing, scattershot boson sampling, and heralded creation of remotely entangled photons, opening up a promising pathway to scalable photonic quantum technologies.
17 pages, 5 figures. the make-SPDC-great-again paper
Databáze: OpenAIRE