Creating heralded hyper-entangled photons using Rydberg atoms

Sutapa Ghosh; Nicholas Rivera; Gadi Eisenstein; Ido Kaminer

doi:10.1038/s41377-021-00537-2

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Creating heralded hyper-entangled photons using Rydberg atoms

Articles

- Creating heralded hyper-entangled photons using Rydberg atoms
- Light: Science & Applications Vol. 10, Issue 7, Pages: 1227-1235(2021)
- Affiliations：
  
  1.Andrew and Erna Viterby Department of Electrical Engineering and Russell Berrie Nanotechnology Institute, Technion-Israel Institute of Technology, Haifa 32000, Israel
  2.Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, USA
- Author bio：
  
  Sutapa Ghosh (sutapa.g@campus.technion.ac.il)
  Ido Kaminer (kaminer@technion.ac.il)
- Funds：
- DOI：10.1038/s41377-021-00537-2
  CLC：
- Published：31 July 2021，
  
  Published Online：12 May 2021，
  
  Received：03 October 2020，
  
  Revised：15 March 2021，
  
  Accepted：18 April 2021
- Accepted：
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Ghosh, S. et al. Creating heralded hyper-entangled photons using Rydberg atoms. Light: Science & Applications, 10, 1227-1235 (2021).
DOI：

Ghosh, S. et al. Creating heralded hyper-entangled photons using Rydberg atoms. Light: Science & Applications, 10, 1227-1235 (2021). DOI： 10.1038/s41377-021-00537-2.

摘要

Abstract

Entangled photon pairs are a fundamental component for testing the foundations of quantum mechanics

and for modern quantum technologies such as teleportation and secured communication. Current state-of-the-art sources are based on nonlinear processes that are limited in their efficiency and wavelength tunability. This motivates the exploration of physical mechanisms for entangled photon generation

with a special interest in mechanisms that can be heralded

preferably at telecommunications wavelengths. Here 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 performance. The heralding of the process enables non-destructive detection of the photon pairs. The 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 atoms. The TPE rate is significantly enhanced by a designed photonic cavity

whose many resonances also translate into high-dimensional entanglement. The 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 hyper-entangled state

which is particularly interesting in high information capacity quantum communication. We characterize the photon comb states by analyzing the Hong-Ou-Mandel interference and propose proof-of-concept experiments.

关键词

Keywords

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