Abstract: When multipartite entanglement is distributed by local measurements on a shared, pre distributed graph state, existing schemes search for a fresh path and re-verify the topology before every request, placing a network-wide classical exchange on the critical path of each one. We introduce DODAG X, which removes it. A single destination-oriented directed acyclic graph […]
Abstract: Facial Emotion Recognition (FER) is essential for enhancing human-computer interaction and psychological analysis. Despite the progress in classical approaches, Quantum Convolutional Neural Networks (QCNNs) offer promising advancements by leveraging quantum parallelism and entanglement for more efficient feature processing. Combining the advantages of both classical and quantum domains, this study introduces a hybrid classical to […]
Abstract: Parameter optimization constitutes a critical computational bottleneck for real-time-capable multi-field quantum conference key agreement (MF-QCKA) in quantum networks, requiring protocol parameters to be adapted to dynamic system configurations. We propose a memory-guided retrieval-augmented (MGRA) framework for parameter optimization under finite computational budgets, comprising an offline memory augmentation stage and an online parameter optimization stage. […]
Abstract: We experimentally demonstrate the coexistence of discrete-variable quantum key distribution (DV-QKD) with high-capacity bidirectional data transmission over multi-core fiber (MCF). The MCF consists of four trench assisted cores with low inter-core cross-talk of 100 km). The quantum channel operates at 1547.7 nm (193.7 THz) using a decoy-state differential phase-shift (DPS) protocol, while 800 Gb/s […]
Abstract: Quantum data encoding (QDE) loads classical data into quantum states and is a core primitive for quantum machine learning and quantum algorithms, yet executing QDE circuits on connectivity-limited noisy quantum processing units (QPUs) requires a compilation-and-reconstruction pipeline that partitions the circuit across the hardware and recombines the fragment outputs. Circuit cutting and knitting provide […]
Abstract: Sharing transactional data with upstream supply-chain partners has long been recognized as beneficial to all involved. Yet many retailers remain reluctant to share for fear of divulging sensitive information. Evidence suggests that more retailers would be willing to share if retailer-sensitive information is concealed prior to sharing. In transactional data, such sensitive information often […]
Abstract: The Wigner function is one of the most important tools for characterizing quantum states in continuous-variable and quantum optical systems, with its negativity serving as a strong indicator of nonclassicality. However, its experimental reconstruction from measurable raw data is a tedious task requiring substantial experimental resources. On the other hand, machine learning has made […]
Abstract: Silicon-based single-photon avalanche photodiodes (SPADs) widely used in space-based quantum communication payloads exhibit an increasing dark count rate (DCR) due to proton radiation induced displacement damage accumulating in their active areas, which could make the device unusable for quantum communication protocols. One known mitigation strategy is laser annealing, and previous studies have demonstrated that […]
Abstract: Quantum key distribution (QKD) has reached a commercially viable stage, with several companies offering hardware systems designed for operational deployment. Evaluating these systems under real-world conditions provides researchers and users with experimental references for their performance and operational variability. In this paper, we present a long-term performance analysis of ID Quantique’s Clavis XGR deployed […]
Abstract: We present an experimental implementation of a three-time-bin phase-encoded twin-field quantum key distribution (TF-QKD) protocol using a Sagnac-based plug-and-play architecture. The proposed encoding method leverages the relative phases of three consecutive time bins to encode two bits per signal. We compare the temporal visibility of three different implementations of this protocol: a plug-and-play (PnP) […]