Polarization-Controlled Quantum Interference in a Metro-Scale Fiber Network
Oct 1, 2025·
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0 min read
Kazi reaz
Md Mehdi Hassan
Jacob e. humberd
Matthew l. boone
Angel fraire estrada
Rick mukherjee
H. r. sadeghpour
Girish s. agarwal
George siopsis
Tian li
Abstract
We report the first demonstration of multi-photon dual-state entanglement distribution over a metropolitan-scale commercial fiber network on the EPB–IonQ Bohr-IV quantum network in Chattanooga using an all-fiber platform, generating a four-photon entangled state from a CW type-II SPDC source and heralding either Bell or N00N states that were successfully distributed between spatially separated nodes despite high loss and limited source fidelity, establishing a scalable path toward upgraded photon sources, White Rabbit synchronization, and active polarization control.
Publication
Multi-Photon Entanglement
Fiber Quantum Network
Metropolitan Quantum Network
Dual-State Entanglement
Bell States
N00N States
SPDC Photon Source
Heralded Entanglement
Telecom Fiber Quantum Communication
Polarization Entanglement
Quantum Networking Testbed
EPB–IonQ Bohr-IV Network
Authors
Authors
Md Mehdi Hassan
(he/him)
PhD Researcher — Experimental Quantum Communication & Networking
Md Mehdi Hassan is a PhD researcher in experimental quantum communication and
quantum networking. His research focuses on precision time synchronization,
entanglement-based quantum communication, and quantum key distribution (QKD).
He works on fiber-based quantum networks, single-photon detection, and
high-precision timing using atomic clocks and time-tagging systems.
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