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</div> <div class="control"> <button class="button is-small is-link">Go</button> </div> </div> </form> </div> </div> <ol class="breathe-horizontal" start="1"> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2409.12675">arXiv:2409.12675</a> <span> [<a href="https://arxiv.org/pdf/2409.12675">pdf</a>, <a href="https://arxiv.org/format/2409.12675">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> </div> <p class="title is-5 mathjax"> Resource Management and Circuit Scheduling for Distributed Quantum Computing Interconnect Networks </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Bahrani%2C+S">Sima Bahrani</a>, <a href="/search/quant-ph?searchtype=author&query=Oliveira%2C+R+D">Romerson D. Oliveira</a>, <a href="/search/quant-ph?searchtype=author&query=Parra-Ullauri%2C+J+M">Juan Marcelo Parra-Ullauri</a>, <a href="/search/quant-ph?searchtype=author&query=Wang%2C+R">Rui Wang</a>, <a href="/search/quant-ph?searchtype=author&query=Simeonidou%2C+D">Dimitra Simeonidou</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2409.12675v2-abstract-short" style="display: inline;"> Distributed quantum computing (DQC) has emerged as a promising approach to overcome the scalability limitations of monolithic quantum processors in terms of computing capability. However, realising the full potential of DQC requires effective resource allocation. This involves efficiently distributing quantum circuits across the network by assigning each circuit to an optimal subset of quantum pro… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.12675v2-abstract-full').style.display = 'inline'; document.getElementById('2409.12675v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2409.12675v2-abstract-full" style="display: none;"> Distributed quantum computing (DQC) has emerged as a promising approach to overcome the scalability limitations of monolithic quantum processors in terms of computing capability. However, realising the full potential of DQC requires effective resource allocation. This involves efficiently distributing quantum circuits across the network by assigning each circuit to an optimal subset of quantum processing units (QPUs), based on factors such as their computational power and connectivity. In heterogeneous DQC networks with arbitrary topologies and non-identical QPUs, resource allocation becomes a complex challenge. This paper addresses the problem of resource allocation in such networks, focusing on computing resource management in a quantum farm setting. We propose a multi-objective optimisation algorithm for optimal QPU allocation that aims to minimise the degradation caused by inter-QPU communication latencies due to qubit decoherence, while maximising the number of concurrently assignable quantum circuits. The algorithm takes into account several key factors, including the network topology, QPU characteristics, and quantum circuit structure, to make efficient allocation decisions. We employ mixed integer linear programming to solve this optimisation problem. Simulation results demonstrate the effectiveness of the proposed algorithm in minimising communication costs and improving resource utilisation compared to a benchmark greedy allocation approach. Notably, assuming a single circuit partition per QPU, the success rate of quantum circuit assignments improves by 5.25%-13.75%. To complement our proposed QPU allocation method, we also present a compatible quantum circuit scheduling model. Our work provides valuable insights into resource allocation strategies for DQC systems and contributes to the development of efficient execution management frameworks for quantum computing. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.12675v2-abstract-full').style.display = 'none'; document.getElementById('2409.12675v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 14 October, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 19 September, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">12 pages, 9 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2403.13503">arXiv:2403.13503</a> <span> [<a href="https://arxiv.org/pdf/2403.13503">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> </div> <p class="title is-5 mathjax"> First Demonstration of 25位 x 10 Gb/s C+L Band Classical / DV-QKD Co-Existence Over Single Bidirectional Fiber Link </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Honz%2C+F">Florian Honz</a>, <a href="/search/quant-ph?searchtype=author&query=Prawits%2C+F">Florian Prawits</a>, <a href="/search/quant-ph?searchtype=author&query=Alia%2C+O">Obada Alia</a>, <a href="/search/quant-ph?searchtype=author&query=Sakr%2C+H">Hesham Sakr</a>, <a href="/search/quant-ph?searchtype=author&query=Bradley%2C+T">Thomas Bradley</a>, <a href="/search/quant-ph?searchtype=author&query=Zhang%2C+C">Cong Zhang</a>, <a href="/search/quant-ph?searchtype=author&query=Slav%C3%ADk%2C+R">Radan Slav铆k</a>, <a href="/search/quant-ph?searchtype=author&query=Poletti%2C+F">Francesco Poletti</a>, <a href="/search/quant-ph?searchtype=author&query=Kanellos%2C+G">George Kanellos</a>, <a href="/search/quant-ph?searchtype=author&query=Nejabati%2C+R">Reza Nejabati</a>, <a href="/search/quant-ph?searchtype=author&query=Walther%2C+P">Philip Walther</a>, <a href="/search/quant-ph?searchtype=author&query=Simeonidou%2C+D">Dimitra Simeonidou</a>, <a href="/search/quant-ph?searchtype=author&query=H%C3%BCbel%2C+H">Hannes H眉bel</a>, <a href="/search/quant-ph?searchtype=author&query=Schrenk%2C+B">Bernhard Schrenk</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2403.13503v1-abstract-short" style="display: inline;"> As quantum key distribution has reached the maturity level for practical deployment, questions about the co-integration with existing classical communication systems are of utmost importance. To this end we demonstrate how the co-propagation of classical and quantum signals can benefit from the development of novel hollow-core fibers. We demonstrate a secure key rate of 330 bit/s for a quantum cha… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2403.13503v1-abstract-full').style.display = 'inline'; document.getElementById('2403.13503v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2403.13503v1-abstract-full" style="display: none;"> As quantum key distribution has reached the maturity level for practical deployment, questions about the co-integration with existing classical communication systems are of utmost importance. To this end we demonstrate how the co-propagation of classical and quantum signals can benefit from the development of novel hollow-core fibers. We demonstrate a secure key rate of 330 bit/s for a quantum channel at 1538 nm in the presence of 25 x 10 Gb/s classical channels, transmitted at an aggregated launch power of 12 dBm, spanning over the C+L-band in the same hollow-core fiber link. Furthermore, we show the co-integration of the classical key-distillation channel onto this fiber link, turning it into a bidirectional fiber link and thereby mitigating the need for multiple fibers. We believe this to be an important step towards the deployment and integration of hollow-core fibers together with DV-QKD for the inherently secure telecom network of the future. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2403.13503v1-abstract-full').style.display = 'none'; document.getElementById('2403.13503v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 March, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2211.09051">arXiv:2211.09051</a> <span> [<a href="https://arxiv.org/pdf/2211.09051">pdf</a>, <a href="https://arxiv.org/format/2211.09051">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1117/12.2645095">10.1117/12.2645095 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Entanglement distribution quantum networking within deployed telecommunications fibre-optic infrastructure </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Clark%2C+M+J">Marcus J Clark</a>, <a href="/search/quant-ph?searchtype=author&query=Alia%2C+O">Obada Alia</a>, <a href="/search/quant-ph?searchtype=author&query=Wang%2C+R">Rui Wang</a>, <a href="/search/quant-ph?searchtype=author&query=Bahrani%2C+S">Sima Bahrani</a>, <a href="/search/quant-ph?searchtype=author&query=Peranic%2C+M">Matej Peranic</a>, <a href="/search/quant-ph?searchtype=author&query=Aktas%2C+D">Djeylan Aktas</a>, <a href="/search/quant-ph?searchtype=author&query=Kanellos%2C+G+T">George T Kanellos</a>, <a href="/search/quant-ph?searchtype=author&query=Loncaric%2C+M">Martin Loncaric</a>, <a href="/search/quant-ph?searchtype=author&query=Samec%2C+Z">Zeljko Samec</a>, <a href="/search/quant-ph?searchtype=author&query=Radman%2C+A">Anton Radman</a>, <a href="/search/quant-ph?searchtype=author&query=Stipcevic%2C+M">Mario Stipcevic</a>, <a href="/search/quant-ph?searchtype=author&query=Nejabati%2C+R">Reza Nejabati</a>, <a href="/search/quant-ph?searchtype=author&query=Simeonidou%2C+D">Dimitra Simeonidou</a>, <a href="/search/quant-ph?searchtype=author&query=Rarity%2C+J+G">John G Rarity</a>, <a href="/search/quant-ph?searchtype=author&query=Joshi%2C+S+K">Siddarth K Joshi</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2211.09051v4-abstract-short" style="display: inline;"> Quantum networks have been shown to connect users with full-mesh topologies without trusted nodes. We present advancements on our scalable polarisation entanglement-based quantum network testbed, which has the ability to perform protocols beyond simple quantum key distribution. Our approach utilises wavelength multiplexing, which is ideal for quantum networks across local metropolitan areas due to… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2211.09051v4-abstract-full').style.display = 'inline'; document.getElementById('2211.09051v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2211.09051v4-abstract-full" style="display: none;"> Quantum networks have been shown to connect users with full-mesh topologies without trusted nodes. We present advancements on our scalable polarisation entanglement-based quantum network testbed, which has the ability to perform protocols beyond simple quantum key distribution. Our approach utilises wavelength multiplexing, which is ideal for quantum networks across local metropolitan areas due to the ease of connecting additional users to the network without increasing the resource requirements per user. We show a 10 user fully connected quantum network with metropolitan scale deployed fibre links, demonstrating polarisation stability and the ability to generate secret keys over a period of 10.8 days with a network wide average-effective secret key rate of 3.38 bps. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2211.09051v4-abstract-full').style.display = 'none'; document.getElementById('2211.09051v4-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 10 February, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 16 November, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">8 pages, 4 figures, 2 tables, SPIE Photonex 2022 conference proceedings</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Proc. SPIE 12335, Quantum Technology: Driving Commercialisation of an Enabling Science III, 123350E (11 January 2023) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2210.00233">arXiv:2210.00233</a> <span> [<a href="https://arxiv.org/pdf/2210.00233">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1109/JLT.2023.3256352">10.1109/JLT.2023.3256352 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Demonstration of 17位 x 10 Gb/s C-Band Classical / DV-QKD Co-Existence Over Hollow-Core Fiber Link </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Honz%2C+F">Florian Honz</a>, <a href="/search/quant-ph?searchtype=author&query=Prawits%2C+F">Florian Prawits</a>, <a href="/search/quant-ph?searchtype=author&query=Alia%2C+O">Obada Alia</a>, <a href="/search/quant-ph?searchtype=author&query=Sakr%2C+H">Hessam Sakr</a>, <a href="/search/quant-ph?searchtype=author&query=Bradley%2C+T">Thomas Bradley</a>, <a href="/search/quant-ph?searchtype=author&query=Zhang%2C+C">Cong Zhang</a>, <a href="/search/quant-ph?searchtype=author&query=Slav%C3%ADk%2C+R">Radan Slav铆k</a>, <a href="/search/quant-ph?searchtype=author&query=Poletti%2C+F">Francesco Poletti</a>, <a href="/search/quant-ph?searchtype=author&query=Kanellos%2C+G">George Kanellos</a>, <a href="/search/quant-ph?searchtype=author&query=Nejabati%2C+R">Reza Nejabati</a>, <a href="/search/quant-ph?searchtype=author&query=Walther%2C+P">Philip Walther</a>, <a href="/search/quant-ph?searchtype=author&query=Simeonidou%2C+D">Dimitra Simeonidou</a>, <a href="/search/quant-ph?searchtype=author&query=H%C3%BCbel%2C+H">Hannes H眉bel</a>, <a href="/search/quant-ph?searchtype=author&query=Schrenk%2C+B">Bernhard Schrenk</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2210.00233v1-abstract-short" style="display: inline;"> We successfully integrate coherent one-way QKD at 1538 nm in a 7.7 km long hollow-core fiber link with 17 EDFA-boosted C-band data channels from 1540.56 to 1558.17 nm, aggregating a power of 11 dBm. QKD operation proves successful despite the wideband layout of classical channels. </span> <span class="abstract-full has-text-grey-dark mathjax" id="2210.00233v1-abstract-full" style="display: none;"> We successfully integrate coherent one-way QKD at 1538 nm in a 7.7 km long hollow-core fiber link with 17 EDFA-boosted C-band data channels from 1540.56 to 1558.17 nm, aggregating a power of 11 dBm. QKD operation proves successful despite the wideband layout of classical channels. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2210.00233v1-abstract-full').style.display = 'none'; document.getElementById('2210.00233v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 1 October, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2022. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2203.14621">arXiv:2203.14621</a> <span> [<a href="https://arxiv.org/pdf/2203.14621">pdf</a>, <a href="https://arxiv.org/format/2203.14621">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Systems and Control">eess.SY</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1109/JLT.2022.3180232">10.1109/JLT.2022.3180232 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> DV-QKD Coexistence With 1.6 Tbps Classical Channels Over Hollow Core Fibre </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Alia%2C+O">Obada Alia</a>, <a href="/search/quant-ph?searchtype=author&query=Tessinari%2C+R+S">Rodrigo S Tessinari</a>, <a href="/search/quant-ph?searchtype=author&query=Bahrani%2C+S">Sima Bahrani</a>, <a href="/search/quant-ph?searchtype=author&query=Bradley%2C+T+D">Thomas D Bradley</a>, <a href="/search/quant-ph?searchtype=author&query=Sakr%2C+H">Hesham Sakr</a>, <a href="/search/quant-ph?searchtype=author&query=Harrington%2C+K">Kerrianne Harrington</a>, <a href="/search/quant-ph?searchtype=author&query=Hayes%2C+J">John Hayes</a>, <a href="/search/quant-ph?searchtype=author&query=Chen%2C+Y">Yong Chen</a>, <a href="/search/quant-ph?searchtype=author&query=Petropoulos%2C+P">Periklis Petropoulos</a>, <a href="/search/quant-ph?searchtype=author&query=Richardson%2C+D">David Richardson</a>, <a href="/search/quant-ph?searchtype=author&query=Poletti%2C+F">Francesco Poletti</a>, <a href="/search/quant-ph?searchtype=author&query=Kanellos%2C+G+T">George T Kanellos</a>, <a href="/search/quant-ph?searchtype=author&query=Nejabati%2C+R">Reja Nejabati</a>, <a href="/search/quant-ph?searchtype=author&query=Simeonidou%2C+D">Dimitra Simeonidou</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2203.14621v1-abstract-short" style="display: inline;"> The feasibility of coexisting a quantum channel with carrier-grade classical optical channels over Hollow Core Nested Antiresonant Nodeless Fibre (HC-NANF) is experimentally explored for the first time in terms of achievable quantum bit error rate (QBER), secret key rate (SKR) as well as classical signal bit error rates (BER). A coexistence transmission of 1.6 Tbps is achieved for the classical ch… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.14621v1-abstract-full').style.display = 'inline'; document.getElementById('2203.14621v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2203.14621v1-abstract-full" style="display: none;"> The feasibility of coexisting a quantum channel with carrier-grade classical optical channels over Hollow Core Nested Antiresonant Nodeless Fibre (HC-NANF) is experimentally explored for the first time in terms of achievable quantum bit error rate (QBER), secret key rate (SKR) as well as classical signal bit error rates (BER). A coexistence transmission of 1.6 Tbps is achieved for the classical channels simultaneously with a quantum channel over a 2 km-long HC-NANF with a total coexistence power of 0 dBm. To find the best and worst wavelength position for the classical channels, we simulated different classical channels bands with different spacing between the quantum and classical channels considering the crosstalk generated from both Raman scattering and four-wave-mixing (FWM) on the quantum channel. Following our simulation, we numerically estimate the best (Raman spectrum dip) and worst locations (Raman spectrum peak) of the classical channel with respect to its impact on the performance on the quantum channel in terms of SKR and QBER. We further implemented a testbed to experimentally test both single mode fibre (SMF) and HC-NANF in the best and worst-case scenarios. In the best-case scenario, the spacing between quantum and classical is 200 GHz (1.6 nm) with 50 GHz (0.4 nm) spacing between each classical channel. The SKR was preserved without any noticeable changes when coexisting the quantum channel with eight classical channels at 0 dBm total coexistence power in HC-NANF compared to a significant drop of 73% when using SMF at -24 dBm total coexistence power which is 250 times lower than the power used in HC-NANF. In the worst-case scenario using the same powers, and with 1 THz (8 nm) spacing between quantum and classical channels, the SKR dropped 10% using the HC-NANF, whereas in the SMF the SKR plummeted to zero. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.14621v1-abstract-full').style.display = 'none'; document.getElementById('2203.14621v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 March, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2022. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2108.11145">arXiv:2108.11145</a> <span> [<a href="https://arxiv.org/pdf/2108.11145">pdf</a>, <a href="https://arxiv.org/format/2108.11145">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Systems and Control">eess.SY</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1109/JLT.2022.3183962">10.1109/JLT.2022.3183962 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Dynamic DV-QKD Networking in Fully-Meshed Software-Defined Optical Networks </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Alia%2C+O">Obada Alia</a>, <a href="/search/quant-ph?searchtype=author&query=Tessinari%2C+R+S">Rodrigo Stange Tessinari</a>, <a href="/search/quant-ph?searchtype=author&query=Hugues-Salas%2C+E">Emilio Hugues-Salas</a>, <a href="/search/quant-ph?searchtype=author&query=Kanellos%2C+G+T">George T. Kanellos</a>, <a href="/search/quant-ph?searchtype=author&query=Nejabati%2C+R">Reza Nejabati</a>, <a href="/search/quant-ph?searchtype=author&query=Simeonidou%2C+D">Dimitra Simeonidou</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2108.11145v2-abstract-short" style="display: inline;"> We demonstrate for the first time a four-node trusted-node-free metro network configuration with dynamic discrete-variable quantum key distribution DV-QKD networking capabilities across four optical network nodes. The network allows the dynamic deployment of any QKD link between two nodes of the network, while a QKD-aware centralised software-defined networking (SDN) controller is utilised to prov… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2108.11145v2-abstract-full').style.display = 'inline'; document.getElementById('2108.11145v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2108.11145v2-abstract-full" style="display: none;"> We demonstrate for the first time a four-node trusted-node-free metro network configuration with dynamic discrete-variable quantum key distribution DV-QKD networking capabilities across four optical network nodes. The network allows the dynamic deployment of any QKD link between two nodes of the network, while a QKD-aware centralised software-defined networking (SDN) controller is utilised to provide dynamicity in switching and rerouting. The feasibility of coexisting a quantum channel with carrier-grade classical optical channels where both the quantum and classical channels are in the C-band over field-deployed metropolitan networks and laboratory-based fibres (<10km) is experimentally explored in terms of achievable quantum bit error rate, secret key rate as well as classical signal bit error rate. Moreover, coexistence analysis over multi-hops configuration using different switching scenarios is also presented. The secret key rate dropped 43% when coexisting one classical channel with 150 GHz spacing from the quantum channel for multiple links. This is due to the noise leakage from the Raman scattering into the 100 GHz bandwidth of the internal filter of the Bob DV-QKD unit. When coexisting four classical channels with 150 GHz spacing between the quantum and the nearest classical channel, the quantum channel deteriorates faster due to the combination of Raman noise, other nonlinearities and high aggregated launch power causing the QBER value to exceed the threshold of 6% leading the SKR to reach a value of zero bps at a launch power of 7 dB per channel. Furthermore, the coexistence of a quantum channel and six classical channels through a field-deployed fibre test network is examined. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2108.11145v2-abstract-full').style.display = 'none'; document.getElementById('2108.11145v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 15 June, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 25 August, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">9 pages, 5 figures, submitted to IEEE Journal of Lightwave Technology</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2106.14560">arXiv:2106.14560</a> <span> [<a href="https://arxiv.org/pdf/2106.14560">pdf</a>, <a href="https://arxiv.org/format/2106.14560">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Systems and Control">eess.SY</span> </div> </div> <p class="title is-5 mathjax"> 1.6 Tbps Classical Channel Coexistence With DV-QKD Over Hollow Core Nested Antiresonant Nodeless Fibre (HC-NANF) </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Alia%2C+O">O. Alia</a>, <a href="/search/quant-ph?searchtype=author&query=Tessinari%2C+R+S">R. S. Tessinari</a>, <a href="/search/quant-ph?searchtype=author&query=Bradley%2C+T+D">T. D. Bradley</a>, <a href="/search/quant-ph?searchtype=author&query=Sakr%2C+H">H. Sakr</a>, <a href="/search/quant-ph?searchtype=author&query=Harrington%2C+K">K. Harrington</a>, <a href="/search/quant-ph?searchtype=author&query=Hayes%2C+J">J. Hayes</a>, <a href="/search/quant-ph?searchtype=author&query=Chen%2C+Y">Y. Chen</a>, <a href="/search/quant-ph?searchtype=author&query=Petropoulos%2C+P">P. Petropoulos</a>, <a href="/search/quant-ph?searchtype=author&query=Richardson%2C+D">D. Richardson</a>, <a href="/search/quant-ph?searchtype=author&query=Poletti%2C+F">F. Poletti</a>, <a href="/search/quant-ph?searchtype=author&query=Kanellos%2C+G+T">G. T. Kanellos</a>, <a href="/search/quant-ph?searchtype=author&query=Nejabati%2C+R">R. Nejabati</a>, <a href="/search/quant-ph?searchtype=author&query=Simeonidou%2C+D">D. Simeonidou</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2106.14560v2-abstract-short" style="display: inline;"> We demonstrate for the first time the coexistence of a quantum-channel and 8x200 Gpbs 16-QAM optical channels with launching powers as high as -9dBm per channel in a 2 km HC-NANF. Comparative analysis with single-mode fibre reveals that the quantum channel could not be sustained at such power levels. </span> <span class="abstract-full has-text-grey-dark mathjax" id="2106.14560v2-abstract-full" style="display: none;"> We demonstrate for the first time the coexistence of a quantum-channel and 8x200 Gpbs 16-QAM optical channels with launching powers as high as -9dBm per channel in a 2 km HC-NANF. Comparative analysis with single-mode fibre reveals that the quantum channel could not be sustained at such power levels. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2106.14560v2-abstract-full').style.display = 'none'; document.getElementById('2106.14560v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 March, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 28 June, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">3 pages, 3 figure, submitted for ECOC2021</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1807.07858">arXiv:1807.07858</a> <span> [<a href="https://arxiv.org/pdf/1807.07858">pdf</a>, <a href="https://arxiv.org/format/1807.07858">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Signal Processing">eess.SP</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> </div> <p class="title is-5 mathjax"> Field-Trial of Machine Learning-Assisted Quantum Key Distribution (QKD) Networking with SDN </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Ou%2C+Y">Y. Ou</a>, <a href="/search/quant-ph?searchtype=author&query=Hugues-Salas%2C+E">E. Hugues-Salas</a>, <a href="/search/quant-ph?searchtype=author&query=Ntavou%2C+F">F. Ntavou</a>, <a href="/search/quant-ph?searchtype=author&query=Wang%2C+R">R. Wang</a>, <a href="/search/quant-ph?searchtype=author&query=Bi%2C+Y">Y. Bi</a>, <a href="/search/quant-ph?searchtype=author&query=Yan%2C+S">SY. Yan</a>, <a href="/search/quant-ph?searchtype=author&query=Kanellos%2C+G">G. Kanellos</a>, <a href="/search/quant-ph?searchtype=author&query=Nejabati%2C+R">R. Nejabati</a>, <a href="/search/quant-ph?searchtype=author&query=Simeonidou%2C+D">D. Simeonidou</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1807.07858v1-abstract-short" style="display: inline;"> We demonstrated, for the first time, a machine-learning method to assist the coexistence between quantum and classical communication channels. Software-defined networking was used to successfully enable the key generation and transmission over a city and campus network. </span> <span class="abstract-full has-text-grey-dark mathjax" id="1807.07858v1-abstract-full" style="display: none;"> We demonstrated, for the first time, a machine-learning method to assist the coexistence between quantum and classical communication channels. Software-defined networking was used to successfully enable the key generation and transmission over a city and campus network. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1807.07858v1-abstract-full').style.display = 'none'; document.getElementById('1807.07858v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 July, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2018. </p> </li> </ol> <div class="is-hidden-tablet">  <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search v0.5.6 released 2020-02-24</a>  </span> </div> </div> </main> <footer> <div class="columns is-desktop" role="navigation" aria-label="Secondary">  <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a 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