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

Enhancing Photon Information Capacity in High-Dimensional Arrival-time-bin QKD through Polarization Hyperentanglement

Murat Can Sarihan, Kai-Chi Chang, Yujie Chen, Xiang Cheng, Hsiao-Hsuan Chin, Chee Wei Wong

Published Jan 1, 2024• 0 citations
Publisher

Abstract

We used frequency-polarization hyperentanglement to eliminate global errors in high-dimensional arrival time-bin encoding and reached a 34% increase in photon information efficiency at a higher frame limit.
DOI
10.1364/cleo_at.2024.jw2a.225

Related papers

Quantum Key Distribution Using Hyperentangled Time-Bin States

Daniel J. Gauthier, Christoph F. Wildfeuer, Hannah E. Guilbert +7 more

We describe our progress on achieving quantum key distribution with high photon efficiency and high rate using hyperentanglement. Methods of securing time-bin states and classical error correction appropriate for our high-dimension protocols will be discussed.

The Rochester Conferences on Coherence and Quantum Optics and the Quantum Information and Measurement meeting•Jan 1, 2013•10 citations

Generation of Hyperentangled Photon Pairs in the Frequency-Bin and Time-Bin Domains with a Silicon Photonic Chip

Sara Congia, Massimo Borghi, Federico Andrea Sabattoli +10 more

Multidimensional entangled photon states represent a useful resource for large-scale quantum communication networks. By leveraging multiple degrees of freedom (DoFs) of photons, the dimensionality of the Hilbert space can be expanded without increasing the number of particles, enhancing the efficiency of quantum information processing. Specifically, hyperentanglement, i.e. simultaneous entanglement across multiple DoFs, is robust against decoherence, thus providing strengthened performance in noisy quantum communication protocols with respect to n-photon quantum states [1].

Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)•Jun 23, 2025•0 citations

Wavelength-Multiplexed Multi-User Quantum Network Based on High-Dimensional Time-bin Encoding

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

We have developed a multi-user QKD network using wavelength multiplexing and high-dimensional arrival-time encoding. We have demonstrated an order of magnitude key rate improvement against recent implementations with >1 bits/photon efficiency.

•Jan 1, 2023•4 citations

Efficient Entanglement Concentration of Nonlocal Two-Photon Polarization-Time-Bin Hyperentangled States

Zihang Wang, Wenxuan Yu, Xiao‐Yuan Wu +4 more

International Journal of Theoretical Physics•Nov 14, 2017•2 citations

Full photon-utilization via frequency-multiplexed time-polarization encoding for photon-efficient quantum key distribution network

Kai Yang, Tianyi Wu, Huadong Zhang +7 more

We explore photon’s full information capacity via exploiting time, frequency, and polarization degrees of freedom, with high photon information efficiency over 7 bits per coincidence, providing a scalable architecture for photon-efficient quantum networking.

•Jan 1, 2026•0 citations

Direct generation of multiphoton hyperentanglement

Peng Zhao, Jia‐Wei Ying, Meng-Ying Yang +7 more

Multiphoton hyperentangement is fundamental in optical quantum information processing. Existing theory and experiments usually focus on producing two-photon hyperentanglement and multiphoton entangled states encoded in a single degree of freedom. Multiphoton entangled states have until now relied on the outcome postselection, a procedure where only the measurement results corresponding to the desired state are considered. Such an approach severely limits the usefulness of the resulting entangled states. We present the protocols of direct production of three- and four-photon hyperentanglement and extend the approach to an arbitrary number of photons through a straightforward cascade of spontaneous parametric down-conversion (SPDC) sources. The generated multiphoton hyperentangled states are encoded in polarization-spatial modes and polarization-time bin degrees of freedom, respectively. Numerical calculation shows that if the average photon number $\ensuremath{\mu}$ is 1, the down-conversion efficiency is $7.6\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}6}$ and the repetition frequency of the laser is ${10}^{9}$ Hz, the number of the generation of three-photon and four-photon hyperentanglement after cascading can reach about $5.78\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}2}$ and $4.44\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}7}$ pairs per second, respectively. By eliminating the constraints of outcome postselection, our protocols may represent progresses for multiphoton hyperentangement generation and provide a pivotal role in future multiparty and high-capacity communication networks.

arXiv:2406.08790•Physical Review Applied•Jan 2, 2025•21 citations
Multidimensional entangled photon states represent a useful resource for large-scale quantum communication networks. By leveraging multiple degrees of freedom (DoFs) of photons, the dimensionality of the Hilbert space can be expanded without increasing the number of particles, enhancing the efficiency of quantum information processing. Specifically, hyperentanglement, i.e. simultaneous entanglement across multiple DoFs, is robust against decoherence, thus providing strengthened performance in noisy quantum communication protocols with respect to n-photon quantum states [1].
Multiphoton hyperentangement is fundamental in optical quantum information processing. Existing theory and experiments usually focus on producing two-photon hyperentanglement and multiphoton entangled states encoded in a single degree of freedom. Multiphoton entangled states have until now relied on the outcome postselection, a procedure where only the measurement results corresponding to the desired state are considered. Such an approach severely limits the usefulness of the resulting entangled states. We present the protocols of direct production of three- and four-photon hyperentanglement and extend the approach to an arbitrary number of photons through a straightforward cascade of spontaneous parametric down-conversion (SPDC) sources. The generated multiphoton hyperentangled states are encoded in polarization-spatial modes and polarization-time bin degrees of freedom, respectively. Numerical calculation shows that if the average photon number $\ensuremath{\mu}$ is 1, the down-conversion efficiency is $7.6\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}6}$ and the repetition frequency of the laser is 109{10}^{9}109 Hz, the number of the generation of three-photon and four-photon hyperentanglement after cascading can reach about $5.78\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}2}$ and $4.44\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}7}$ pairs per second, respectively. By eliminating the constraints of outcome postselection, our protocols may represent progresses for multiphoton hyperentangement generation and provide a pivotal role in future multiparty and high-capacity communication networks.