1GHz clocked distribution of electrically generated entangled photon pairs

• URL: http://arxiv.org/abs/2004.14880v2
• Date: Tue, 2 Nov 2021 15:52:12 GMT
• Title: 1GHz clocked distribution of electrically generated entangled photon pairs
• Authors: Ginny Shooter (1 and 2), Ziheng Xiang (1 and 2), Jonathan R.A. M\"uller (1 and 3), Joanna Skiba-Szymanska (1), Jan Huwer (1), Jonathan Griffiths (2), Thomas Mitchell (2), Matthew Anderson (1 and 2), Tina M\"uller (1), Andrey B. Krysa (4), R. Mark Stevenson (1), Jon Heffernan (4), David A. Ritchie (2), Andrew J. Shields (1) ((1) Toshiba Research Europe Limited, Cambridge Research Laboratory, (2) Cavendish Laboratory, University of Cambridge, (3) Department of Physics and Astronomy, University of Sheffield, (4) EPSRC National Epitaxy Facility, Department of Electronic & Electrical Engineering, University of Sheffield)
• Abstract summary: We show the first electrically pulsed sub-Poissonian entangled photon source compatible with existing fiber networks operating at 1GHz. The 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. We use this device to demonstrate GHz clocked distribution of entangled qubits over an installed fiber network between two points 4.6km apart.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: 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.

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