1GHz clocked distribution of electrically generated entangled photon pairs

Quantum networks are essential for realising distributed quantum computation and quantum communication. Entangled photons are a key resource, with applications such as quantum key distribution, quantum relays, and quantum repeaters. All components integrated in a quantum network must be synchronised...

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Bibliographic Details
Published in:arXiv.org 2021-11
Main Authors: Shooter, Ginny, Xiang, Ziheng, Müller, Jonathan R A, Skiba-Szymanska, Joanna, Huwer, Jan, Griffiths, Jonathan, Mitchell, Thomas, Anderson, Matthew, Müller, Tina, Krysa, Andrey B, Stevenson, R Mark, Heffernan, Jon, Ritchie, David A, Shields, Andrew J
Format: Article
Language:English
Subjects:
Photons
Quantum computing
Quantum cryptography
Quantum dots
Quantum entanglement
Qubits (quantum computing)
Repeaters
Online Access:Get full text
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Summary:Quantum networks are essential for realising distributed quantum computation and quantum communication. Entangled photons are a key resource, with applications such as quantum key distribution, quantum relays, and quantum repeaters. All components integrated in a quantum network must be synchronised and therefore comply with a certain clock frequency. In quantum key distribution, the most mature technology, clock rates have reached and exceeded 1GHz. Here we show the first electrically pulsed sub-Poissonian entangled photon source compatible with existing fiber networks operating at this clock rate. The entangled LED is based on InAs/InP quantum dots emitting in the main telecom window, with a multi-photon probability of less than 10% per emission cycle and a maximum entanglement fidelity of 89%. We use this device to demonstrate GHz clocked distribution of entangled qubits over an installed fiber network between two points 4.6km apart.
ISSN:2331-8422
DOI:10.48550/arxiv.2004.14880