11 research outputs found
Polarisation Based Entanglement Distribution Quantum Networking
Quantum networks based on entanglement distribution have shown promise for building scalable and fully connected systems that support quantum key distribution. This work aims to go beyond simply implementing quantum key distribution and explore the potential of such networks for implementing quantum photonic interconnects. Our research demonstrates the passive polarization stability of these networks for over a week and highlights the benefits of dynamic reconfiguration to remove redundant resources. We discuss recent advancements in quantum frequency conversion and quantum memory-based networks, and argue that the development of scalable, long-distance interconnects is crucial for advancing quantum technology. Our findings have important implications for the future of quantum networking and highlight the need for entanglement based photonic interconnect networks, such that quantum technology can scale beyond monolithic systems
Towards a Fully Connected Many-User Entanglement Distribution Quantum Network Within Deployed Telecommunications Fibre-Optic Infrastructure
We present developments in entanglement distribution quantum networks towards a fully connected, scalable, many-user network, which is not limited to simple quantum key distribution protocol
Space QUEST mission proposal: experimentally testing decoherence due to gravity
Models of quantum systems on curved space-times lack sufficient experimental
verification. Some speculative theories suggest that quantum properties, such
as entanglement, may exhibit entirely different behavior to purely classical
systems. By measuring this effect or lack thereof, we can test the hypotheses
behind several such models. For instance, as predicted by Ralph and coworkers
[T C Ralph, G J Milburn, and T Downes, Phys. Rev. A, 79(2):22121, 2009, T C
Ralph and J Pienaar, New Journal of Physics, 16(8):85008, 2014], a bipartite
entangled system could decohere if each particle traversed through a different
gravitational field gradient. We propose to study this effect in a ground to
space uplink scenario. We extend the above theoretical predictions of Ralph and
coworkers and discuss the scientific consequences of detecting/failing to
detect the predicted gravitational decoherence. We present a detailed mission
design of the European Space Agency's (ESA) Space QUEST (Space - Quantum
Entanglement Space Test) mission, and study the feasibility of the mission
schema.Comment: 18 pages, 13 figures, included radiation damage to detectors in
appendi
Entanglement distribution quantum networking within deployed telecommunications fibre-optic infrastructure
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
Protocols beyond Just QKD on an Eight-User Quantum Network
Quantum networks have been limited to QKD. Here we present an 8 user quantum network running 5 different anonymity protocols, digital signatures, authentication transfer (sharing initial authentication keys) and flooding (optimally utilization of resources).</p