Displacement-based simultaneous quantum-classical communications (SQCC) protocols, as originally proposed, are generally incompatible with the majority of useful quantum communication schemes, such as entanglement distribution or repeater-based quantum key distribution: direct measurement of the classical signal also measures and destroys the quantum state, leaving point-to-point Gaussian quantum key distribution as the only quantum communication scheme amenable to integration with SQCC. In this work, we apply the classically-modulated quantum communication protocol proposed by Zaunders and Ralph [arXiv:2606.03181v3] to circumvent this issue and demonstrate the distribution of continuous-variable Gaussian entanglement simultaneously with classical information. We characterise the quality of the distributed entangled state and outline how the scheme is suitable for use in repeater-based networks. Lastly, we compute the secret key generation rate of the Gaussian CMQC scheme in the point-to-point case and compare it to the equivalent point-to-point SQCC protocol.
Gaussian-modulated coherent-state (GMCS) continuous-variable quantum key distribution (CV-QKD) offers a practical path to quantum-secured communication owing to its compatibility with existing optical fibre networks and use of mature security proofs. Achieving high secret key rates in real-time systems, however, re...
Adam Alderton, Amanda Weerasinghe, Muataz Alhussein et al.· npj Quantum Information· 0 citations
Widely deployed public-key cryptography is vulnerable to sufficiently capable quantum computers, motivating post-quantum and quantum-cryptographic responses. This structured narrative review examines foundational theory and selected literature, drawing on a screening of 71 publications, of which 38 were retained and ci...
T. Olayinka, Samuel Olayemi Adewara· Nigerian Journal of Theoreti...· 0 citations
A Multi-Qubit Greenberger--Horne--Zeilinger (GHZ) State-based QKD scheme that reduces the number of qubits transmitted over the quantum channel and can be extended to multi-party QKD and server-client deployment.
Tasdiqul Islam, Rasman Mubtasim Swargo, Engin Arslan et al.· 0 citations
We develop a family of semi-device-independent (SDI) entanglement-assisted prepare-measure (PM) communication games involving two parties, within the n→l random-access code (RAC) framework where the sender Alice holds a n-bit string and communicates l<n bits or qubits to the receiver Bob. In contrast to the standard qu...
Rajdeep Paul, Prabuddha Roy, A. Pan· New Journal of Physics· 0 citations
Quantum secure direct communication (QSDC) enables the direct transmission of confidential messages without pre-establishing a secret key. Device independence (DI) can further enhance its practical security against untrusted devices. However, existing DI-QSDC protocols rely on a single Clauser–Horne–Shimony–Holt inequa...
This paper is a tutorial-style introduction to methods and protocols for reliable transmission of quantum information over noisy quantum links. The exposition is based on a design philosophy that parallels classical link-layer mechanisms such as forward error correction and Automatic Repeat reQuest (ARQ). It starts by...
Mahmoud Saad Abouamer, Jaemin Kim, Jaron Skovsted Gundersen et al.· IEEE Open Journal of the Com...· 0 citations
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