Creating heralded hyper-entangled photons using Rydberg atoms
作者机构：Andrew and Erna Viterby Department of Electrical Engineering and Russell Berrie Nanotechnology InstituteTechnion-Israel Institute of TechnologyHaifa 32000Israel Department of PhysicsMassachusetts Institute of TechnologyCambridgeMAUSA
出 版 物：《Light(Science & Applications)》 (光（科学与应用)（英文版）)
年 卷 期：2021年第10卷第7期
页 面：1227-1235页
核心收录：
学科分类：070207[理学-光学] 07[理学] 08[工学] 0803[工学-光学工程] 0702[理学-物理学]
基 金：supported by the GIF Young Scientists’Program supported by the Helen Diller Quantum Center fellowship supported by Department of Energy Fellowship DE-FG02-97ER25308 a Dean’s Fellowship of the MIT School of Science
摘 要：Entangled photon pairs are a fundamental component for testing the foundations of quantum mechanics,and for modern quantum technologies such as teleportation and secured *** state-of-the-art sources are based on nonlinear processes that are limited in their efficiency and wavelength *** motivates the exploration of physical mechanisms for entangled photon generation,with a special interest in mechanisms that can be heralded,preferably at telecommunications *** we present a mechanism for the generation of heralded entangled photons from Rydberg atom cavity quantum electrodynamics(cavity QED).We propose a scheme to demonstrate the mechanism and quantify its expected *** heralding of the process enables non-destructive detection of the photon *** entangled photons are produced by exciting a rubidium atom to a Rydberg state,from where the atom decays via two-photon emission(TPE).A Rydberg blockade helps to excite a single Rydberg excitation while the input light field is more efficiently collectively absorbed by all the *** TPE rate is significantly enhanced by a designed photonic cavity,whose many resonances also translate into high-dimensional *** resulting high-dimensionally entangled photons are entangled in more than one degree of freedom:in all of their spectral components,in addition to the polarization—forming a hyperentangled state,which is particularly interesting in high information capacity quantum *** characterize the photon comb states by analyzing the Hong-Ou-Mandel interference and propose proof-of-concept experiments.
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