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

Bulletin of the American Physical Society

Direct Characterization of Einstein-Podolsky-Rosen Energy-Time Entangled Narrowband Biphotons

Yefeng Mei, Yiru Zhou, Shanchao Zhang, Jian‐Feng Li, Kai-Yu Liao, Hui Yan, Shi-Liang Zhu, Shengwang Du

Published Jun 3, 2020• 0 citations
OpenAlex

Related papers

Narrowband Entangled Photon Pairs

Shengwang Du

•Jan 1, 2017•0 citations

Einstein-Podolsky-Rosen Energy-Time Entanglement of Narrow-Band Biphotons

Yefeng Mei, Yiru Zhou, Shanchao Zhang +5 more

We report the direct characterization of energy-time entanglement of narrow-band biphotons produced from spontaneous four-wave mixing in cold atoms. The Stokes and anti-Stokes two-photon temporal correlation is measured by single-photon counters with nanosecond temporal resolution, and their joint spectrum is determined by using a narrow linewidth optical cavity. The energy-time entanglement is verified by the joint frequency-time uncertainty product of 0.063±0.0044, which does not only violate the separability criterion but also satisfies the continuous variable Einstein-Podolsky-Rosen steering inequality.

arXiv:1911.00723•Physical Review Letters•Jan 10, 2020•36 citations

Narrowband Biphotons with Frequency-Bin Entanglement

Shengwang Du

•Jan 1, 2015•0 citations

Generation of positively-momentum-correlated biphotons from spontaneous parametric down-conversion

Sujun Yun, Ping Xu, J. S. Zhao +4 more

We propose to generate a counter-Einstein-Podolsky-Rosen (CEPR) state which possesses a positively-correlated momentum and anticorrelated position directly from spontaneous parametric down-conversion. The general CEPR state is given under a tightly focused Gaussian pump based on type II noncritical phase matching. We analytically and numerically study how a positively-correlated momentum and anticorrelated position of a biphoton can be achieved by choosing the proper focal parameter of the pump. To verify the degree of entanglement of the CEPR state, we calculate its entanglement entropy and it shows a unique dependence on the pump's focal parameter. Suggestions for practical engineering of the state are also given. Furthermore, based on an ideal CEPR state, we deduce a type of erect quantum ghost imaging which can be applied as the entanglement criterion. This work gives applicable references to the spatial control of an entangled photon source in experiments and may stimulate the development of new types of quantum technologies.

Physical Review A•Aug 29, 2012•14 citations

Generation of remote multi-photon entangled state from Einstein–Podolsky–Rosen photon pairs

Han Zhao, Xiao-Qing Zhou, Xiao-Lin Yang

Optics Communications•Feb 25, 2010•3 citations

Energy-time entangled and Einstein-Podolsky-Rosen steerable large-alphabet quantum key distribution

Kai-Chi Chang, Murat Can Sarihan, Xiang Cheng +1 more

We experimentally demonstrated the violation of energy-time entanglement and Einstein-Podolsky-Rosen steering inequality, toward high-dimensional quantum key distribution with secure photon information efficiency of 3.68 bits/coincidences, and secure key rate of 1.77 Mbits/s.

•Jan 1, 2023•0 citations
We report the direct characterization of energy-time entanglement of narrow-band biphotons produced from spontaneous four-wave mixing in cold atoms. The Stokes and anti-Stokes two-photon temporal correlation is measured by single-photon counters with nanosecond temporal resolution, and their joint spectrum is determined by using a narrow linewidth optical cavity. The energy-time entanglement is verified by the joint frequency-time uncertainty product of 0.063±0.0044, which does not only violate the separability criterion but also satisfies the continuous variable Einstein-Podolsky-Rosen steering inequality.
We propose to generate a counter-Einstein-Podolsky-Rosen (CEPR) state which possesses a positively-correlated momentum and anticorrelated position directly from spontaneous parametric down-conversion. The general CEPR state is given under a tightly focused Gaussian pump based on type II noncritical phase matching. We analytically and numerically study how a positively-correlated momentum and anticorrelated position of a biphoton can be achieved by choosing the proper focal parameter of the pump. To verify the degree of entanglement of the CEPR state, we calculate its entanglement entropy and it shows a unique dependence on the pump's focal parameter. Suggestions for practical engineering of the state are also given. Furthermore, based on an ideal CEPR state, we deduce a type of erect quantum ghost imaging which can be applied as the entanglement criterion. This work gives applicable references to the spatial control of an entangled photon source in experiments and may stimulate the development of new types of quantum technologies.