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Creating heralded hyper-entangled photons using Rydberg atoms

Light(Science & Applications) 2021年第7期10卷 1227-1235页

作者： Sutapa Ghosh Nicholas Rivera Gadi Eisenstein Ido Kaminer Andrew and Erna Viterby Department of Electrical Engineering and Russell Berrie Nanotechnology Institute Technion-Israel Institute of TechnologyHaifa 32000Israel Department of Physics Massachusetts Institute of TechnologyCambridgeMAUSA

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.

关键词： Rydberg quantum proof

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