Modular network for high-rate quantum conferencing

Abstract

One of the main open problems in quantum communication is the design of efficient quantum-secured networks. This is a challenging goal, because it requires protocols that guarantee both unconditional security and high communication rates, while increasing the number of users. In this scenario, continuous-variable systems provide an ideal platform where high rates can be achieved by using off-the-shelf optical components. At the same time, the measurement-device independent architecture is also appealing for its feature of removing a substantial portion of practical weaknesses. Driven by these ideas, here we introduce a modular design of continuous-variable network where each individual module is a measurement-device-independent star network. In each module, the users send modulated coherent states to an untrusted relay, creating multipartite secret correlations via a generalized Bell detection. Using one-time pad between different modules, the network users may share a quantum-secure conference key over arbitrary distances at constant rate.

REVTeX. 18 pages (main text plus supplementary information), 8 figures

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Cited by in corpus (27)

• Advances in Quantum Cryptography
• Towards real-world quantum networks: a review
• Quantum Conference Key Agreement: A Review
• Universal Limitations on Quantum Key Distribution over a Network
• Conference key agreement with single-photon interference
• Heterogeneously integrated, superconducting silicon-photonic platform for measurement-device-independent quantum key distribution
• Conference key agreement in a quantum network
• Experimental Demonstration of Sequential Multiparty Quantum Secret Sharing and Quantum Conference Key Agreement
• Complex Quantum Networks: a Topical Review
• Coherent one-way quantum conference key agreement based on twin field
• Secure Anonymous Conferencing in Quantum Networks
• Finite-key Analysis for Quantum Conference Key Agreement with Asymmetric Channels
• Breaking universal limitations on quantum conference key agreement without quantum memory
• Repeater-like asynchronous measurement-device-independent quantum conference key agreement
• High key rate quantum conference key agreement with unconditional security
• Overcoming fundamental bounds on quantum conference key agreement
• General upper bounds for distributing conferencing keys in arbitrary quantum networks
• Genuine multipartite entanglement is not a precondition for secure conference key agreement
• Advances in Continuous Variable Measurement-Device-Independent Quantum Key Distribution
• The future of secure communications: device independence in quantum key distribution
• Anonymous conference key agreement in linear quantum networks
• An Overview of CV-MDI-QKD
• Continuous-variable measurement device independent quantum conferencing with post-selection
• An introductory review of the theory of continuous-variable quantum key distribution: Fundamentals, protocols, and security
• Entangled N-photon states for fair and optimal social decision making
• Quantum communications infrastructure architecture: theoretical background, network structure and technologies. A review of recent studies from a European public infrastructure perspective
• Continuous-Variable Quantum Key Distribution with Composable Security and Tight Error Correction Bound towards Constrained-Device Implementations