Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Conference on Lasers and Electro-Optics

Coherent Backscattering of Spatially Entangled Photons

Mamoon Safadi, Ohad Lib, Yaron Bromberg

Published Jan 1, 2021• 0 citations
Publisher

Abstract

We report the first observation of coherent backscattering of spatially entangled photons and show that the backscattering cone of entangled photons corresponds to that of single photons with half the wavelength.
DOI
10.1364/cleo_qels.2021.fth1m.8

Related papers

Coherent Backscattering of Entangled Photon Pairs

Mamoon Safadi, Ohad Lib, Ho-Chun Lin +3 more

We report on the first observation and study of coherent backscattering of entangled photon pairs. We show that after the photons backscatter from a dynamic random medium, they remain correlated, exhibiting a new mesoscopic phenomenon.

Conference on Lasers and Electro-Optics•Jan 1, 2022•2 citations

Coherent backscattering of entangled photon pairs

Mamoon Safadi, Ohad Lib, Ho-Chun Lin +3 more

arXiv:2203.09650•Nature Physics•Jan 23, 2023•10 citations

Effect of the Photon’s Brownian Doppler Shift on the Weak-Localization Coherent-Backscattering Cone

M. Lesaffre, Michaël Atlan, M. Groß

We report the first observation of the dependence of the coherent-backscattering (CBS) enhanced cone with the frequency of the backscattered photon. The experiment is performed on a diffusing liquid suspension and the Doppler broadening of light is induced by the Brownian motion of the scatterers. Heterodyne detection on a CCD camera is used to measure the complex field (i.e., the hologram) of the light that is backscattered at a given frequency. The analysis of the holograms yield the frequency and the propagation direction of the backscattered photons. We observe that the angular CBS cone becomes more narrow in the tail of the Brownian spectrum. The experimental results are in good agreement with a simple theoretical model.

arXiv:0804.2129•Physical Review Letters•Jul 17, 2006•8 citations

Coherent two-photon backscattering and induced angular quantum correlations in multiple-scattered two-photon states of the light

Nooshin M. Estakhri, Theodore B. Norris

Abstract We present the emergence of coherent two-photon backscattering, a manifestation of weak localization, in multiple scattering of maximally entangled pure and fully mixed two-photon states and examine the effect of entanglement and classical correlations. Quantum correlations in backscattering are investigated for finite three-dimensional disordered structures in the weak localization regime, as well as systems of a small number of scatterers with specified spatial arrangements. No assumptions are made about the statistical behavior of the scattering matrix elements. Furthermore, we study the interplay between quantum correlations induced by multiple scattering and the correlations that may be present in the illumination fields, and how they are manifested in the output modes. We study the effect of the dimensionality of the entanglement and the angular distribution of the jointly measurable photon pairs on the emergence of enhancement and angular quantum correlations and show how quantum correlations can be used as a probe of the entanglement dimensionality. We show that by increasing the disordered material density, the width of the coherent two-photon backscattering cones increases, in accordance with the reduction of the mean free path length within the structure.

arXiv:2401.13176•Journal of Physics Photonics•May 20, 2026•1 citation

Light Scattering with Entangled Photons

J. P. Woerdman, Andrea Aiello, D. Voigt +1 more

We study experimentally the scattering of polarization-entangled twin photons by a large variety of inhomogeneous media. The scattered twin photons are generally in a mixed state which shows a surprisingly universal behavior.

Frontiers in Optics•Jan 1, 2006•1 citation

Dynamics of random laser and coherent backscattering of light from ZnO amplifying random medium

T. Sun, Zhiren Qiu, Huimin Su +4 more

We investigated the dynamics of coherent backscattering cone and random laser in a disordered gain medium of ZnO powder. Theoretical fit to the coherent backscattering cone yields a transport mean free path l approximately equal to the probe wavelength λ, indicating that the scattering process is in the strong scattering regime. Supernarrow emissions from the laser are accompanied by enhancement and sharpening of the coherent backscattering cone. This enhanced and sharpened backscattering cone returns to a normal profile within 10–20ps, indicating an ultrafast gain lifetime in the medium, which is in good agreement with the time-resolved measurement of the random laser emissions.

Applied Physics Letters•Dec 10, 2007•11 citations
We report the first observation of the dependence of the coherent-backscattering (CBS) enhanced cone with the frequency of the backscattered photon. The experiment is performed on a diffusing liquid suspension and the Doppler broadening of light is induced by the Brownian motion of the scatterers. Heterodyne detection on a CCD camera is used to measure the complex field (i.e., the hologram) of the light that is backscattered at a given frequency. The analysis of the holograms yield the frequency and the propagation direction of the backscattered photons. We observe that the angular CBS cone becomes more narrow in the tail of the Brownian spectrum. The experimental results are in good agreement with a simple theoretical model.
Abstract We present the emergence of coherent two-photon backscattering, a manifestation of weak localization, in multiple scattering of maximally entangled pure and fully mixed two-photon states and examine the effect of entanglement and classical correlations. Quantum correlations in backscattering are investigated for finite three-dimensional disordered structures in the weak localization regime, as well as systems of a small number of scatterers with specified spatial arrangements. No assumptions are made about the statistical behavior of the scattering matrix elements. Furthermore, we study the interplay between quantum correlations induced by multiple scattering and the correlations that may be present in the illumination fields, and how they are manifested in the output modes. We study the effect of the dimensionality of the entanglement and the angular distribution of the jointly measurable photon pairs on the emergence of enhancement and angular quantum correlations and show how quantum correlations can be used as a probe of the entanglement dimensionality. We show that by increasing the disordered material density, the width of the coherent two-photon backscattering cones increases, in accordance with the reduction of the mean free path length within the structure.
We investigated the dynamics of coherent backscattering cone and random laser in a disordered gain medium of ZnO powder. Theoretical fit to the coherent backscattering cone yields a transport mean free path l approximately equal to the probe wavelength λ, indicating that the scattering process is in the strong scattering regime. Supernarrow emissions from the laser are accompanied by enhancement and sharpening of the coherent backscattering cone. This enhanced and sharpened backscattering cone returns to a normal profile within 10–20ps, indicating an ultrafast gain lifetime in the medium, which is in good agreement with the time-resolved measurement of the random laser emissions.