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

Quantum 2.0 Conference and Exhibition

Generation of Time-bin GHZ States

Samantha I. Davis, Chang Li, Rahaf Youssef, Neil E. Sinclair, Raju Valivarthi, M. Spiropulu

Published Jan 1, 2023• 0 citations
Publisher

Abstract

We detail our experiments towards generating GHZ states encoded into time-bin qubits using a switch. We present a theoretical model founded on phase-space techniques to corroborate our experimental findings.
DOI
10.1364/quantum.2023.qth4a.7

Related papers

Generation of GHZ States with Time-bin Qubits

Samantha I. Davis, Chang Li, Rahaf Youssef +2 more

We report our progress towards the first experimental d emonstration of three photon time-bin GHZ entangled states. We also develop a theoretical model based on phase-space techniques to support the experimental results.

•Jan 1, 2023•0 citations

Four qubit time-bin entangled GHZ-state generation

Leili Esmaeilifar, Ashutosh Kumar Singh, Pascal Lefebvre +2 more

A pair of time-bin entangled states are generated using the spontaneous parametric down-conversion process in two PPLN crystals. One photon from either source interferes on an optical switch. A four-qubit GHZ-state is generated by post-selecting the photons at all the four output ports.

IEEE Photonics Conference•Nov 10, 2024•0 citations

Three-Photon Time-Bin Entanglement Generation using an Optical Switch

Hsin-Pin Lo, Takuya Ikuta, Koji Azuma +3 more

We realized the first three-photon time-bin GHZ states using a 2 × 2 optical switch as a time-dependent beam splitter to entangle a photon from a weak coherent light and a photon from a time-bin entangled photon pair.

Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)•Jul 31, 2022•0 citations

Three-photon time-bin entanglement generation using an optical switch

Hsin-Pin Lo, Takuya Ikuta, Koji Azuma +3 more

We realized the first three-photon time-bin GHZ states using a 2×2 optical switch as a time-dependent beam splitter to entangle a photon from a weak coherent light and a photon from a time-bin entangled photon pair.

Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)•Jan 1, 2022•0 citations

Generation of a microwave time-bin qubit with a superconducting qubit

Jesper Ilves, Shota Yamazaki, Shingo Kono +4 more

Bulletin of the American Physical Society•Mar 4, 2019•0 citations

Generation of a time–bin Greenberger–Horne–Zeilinger state with an optical switch

Hsin-Pin Lo, Takuya Ikuta, Koji Azuma +3 more

Abstract Multipartite entanglement is a critical resource in quantum information processing that exhibits much richer phenomenon and stronger correlations than in bipartite systems. This advantage is also reflected in its multi-user applications. Although many demonstrations have used photonic polarization qubits, polarization-mode dispersion confines the transmission of photonic polarization qubits through an optical fiber. Consequently, time–bin qubits have a particularly important role to play in quantum communication systems. Here, we generate a three-photon time–bin Greenberger–Horne–Zeilinger (GHZ) state using a 2 × 2 optical switch as a time-dependent beam splitter to entangle time–bin Bell states from a spontaneous parametric down-conversion source and a weak coherent pulse. To characterize the three-photon time–bin GHZ state, we performed measurement estimation, showed a violation of the Mermin inequality, and used quantum state tomography to fully reconstruct a density matrix, which shows a state fidelity exceeding 70%. We expect that our three-photon time–bin GHZ state can be used for long-distance multi-user quantum communication.

arXiv:2304.05683•Quantum Science and Technology•Mar 27, 2023•14 citations
Abstract Multipartite entanglement is a critical resource in quantum information processing that exhibits much richer phenomenon and stronger correlations than in bipartite systems. This advantage is also reflected in its multi-user applications. Although many demonstrations have used photonic polarization qubits, polarization-mode dispersion confines the transmission of photonic polarization qubits through an optical fiber. Consequently, time–bin qubits have a particularly important role to play in quantum communication systems. Here, we generate a three-photon time–bin Greenberger–Horne–Zeilinger (GHZ) state using a 2 × 2 optical switch as a time-dependent beam splitter to entangle time–bin Bell states from a spontaneous parametric down-conversion source and a weak coherent pulse. To characterize the three-photon time–bin GHZ state, we performed measurement estimation, showed a violation of the Mermin inequality, and used quantum state tomography to fully reconstruct a density matrix, which shows a state fidelity exceeding 70%. We expect that our three-photon time–bin GHZ state can be used for long-distance multi-user quantum communication.