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Spontaneous Parametric Down‐Conversion Sources for Multiphoton Experiments
Author(s) -
Zhang Chao,
Huang YunFeng,
Liu BiHeng,
Li ChuanFeng,
Guo GuangCan
Publication year - 2021
Publication title -
advanced quantum technologies
Language(s) - English
Resource type - Journals
ISSN - 2511-9044
DOI - 10.1002/qute.202000132
Subject(s) - spontaneous parametric down conversion , parametric statistics , photon , nondeterministic algorithm , photonics , physics , computer science , process (computing) , brightness , quantum key distribution , quantum optics , key (lock) , photon entanglement , quantum , quantum entanglement , optics , algorithm , quantum mechanics , mathematics , statistics , computer security , operating system
Entangled photon sources are desirable and key elements for photonic quantum information processing. The spontaneous parametric down‐conversion (SPDC) process is a convenient way to produce entangled photon pairs. It has been widely used and has already made great contributions to quantum information science. SPDC sources have been thoroughly studied, and a detailed review, previously lacking, is now appropriate. In this article, different types of SPDC sources suitable for multiphoton experiments are reviewed. A comparison of their respective performances is presented, focusing on the parameters of indistinguishability, collection efficiency, and brightness, from which it is possible to see how the spatial and spectral properties of the SPDC process can be tailored, step by step, to achieve near‐perfect photon pairs. Recent progress on multiplexed heralded single‐photon sources, which effectively mitigate the nondeterministic nature of the SPDC process, is also described.