Learning to Decode Quantum LDPC Codes Via Belief Propagation

This paper proposes a reinforcement learning-based decoder for quantum LDPC codes that formulates decoding as a Markov decision process with local syndrome-driven states and second-order neighborhood updates to overcome convergence issues caused by quantum degeneracy and short cycles, achieving superior performance and faster convergence than traditional schedules while maintaining competitive complexity.

Mohsen Moradi, Vahid Nourozi, Salman Habib, David G. M. MitchellThu, 12 Ma🔢 math

LWM-Temporal: Sparse Spatio-Temporal Attention for Wireless Channel Representation Learning

LWM-Temporal is a task-agnostic foundation model for wireless channels that leverages a novel Sparse Spatio-Temporal Attention mechanism and physics-informed pretraining to learn universal, geometry-consistent embeddings, achieving superior performance in channel prediction across diverse mobility regimes with limited fine-tuning data.

Sadjad Alikhani, Akshay Malhotra, Shahab Hamidi-Rad, Ahmed AlkhateebThu, 12 Ma🤖 cs.LG

Quantization of Ricci Curvature in Information Geometry

This paper resolves a 20-year-old conjecture by proving that the volume-averaged Ricci scalar of binary Bayesian networks is universally quantized to positive half-integers for tree and complete-graph structures via a Beta function cancellation mechanism, while demonstrating that this quantization fails in general due to loop counterexamples and contrasting the positive curvature of discrete networks with the negative curvature of Gaussian DAGs.

Carlos C. RodriguezThu, 12 Ma🔢 math

Universal Shuffle Asymptotics, Part II: Non-Gaussian Limits for Shuffle Privacy -- Poisson, Skellam, and Compound-Poisson Regimes

This paper establishes the first universality-breaking frontier in shuffle privacy by characterizing the asymptotic behavior of concentrated local randomizers that fail classical Gaussian limits, proving convergence to explicit Poisson, Skellam, and compound-Poisson shift experiments and providing a complete three-regime picture of shuffle privacy limits.

Alex ShvetsThu, 12 Ma📊 stat

Cellular, Cell-less, and Everything in Between: A Unified Framework for Utility Region Analysis in Wireless Networks

This paper introduces a unified framework for analyzing wireless network utility regions based on the spectral radius of nonlinear mappings, offering a powerful mathematical tool to characterize feasible regions, derive tractable conditions for convexity, and optimize sum-rate maximization across cellular, cell-less, and hybrid architectures.

Renato Luis Garrido Cavalcante, Tomasz Piotrowski, Slawomir StanczakMon, 09 Ma🔢 math

On the Tail Transition of First Arrival Position Channels: From Cauchy to Exponential Decay

This paper characterizes the transition of first arrival position channel noise from heavy-tailed Cauchy to exponentially decaying distributions under nonzero drift, identifying a characteristic propagation distance that delineates diffusion-dominated and drift-dominated regimes while demonstrating that Gaussian approximations fail to capture communication potential in low-drift environments.

Yen-Chi LeeMon, 09 Ma🔢 math

Unequal Error Protection for Digital Semantic Communication with Channel Coding

This paper proposes two novel unequal error protection frameworks for digital semantic communication that leverage learned bit-flip probabilities to assign heterogeneous reliability levels, demonstrating that partitioning semantic bits into short blocks with tailored channel codes significantly outperforms conventional equal-protection schemes in both task performance and transmission efficiency.

Seonjung Kim, Yongjeong Oh, Yongjune Kim, Namyoon Lee, Yo-Seb JeonMon, 09 Ma🔢 math

Alkaid: Resilience to Edit Errors in Provably Secure Steganography via Distance-Constrained Encoding

The paper proposes Alkaid, a provably secure steganographic scheme that achieves deterministic robustness against edit errors by integrating minimum distance decoding into the encoding process, thereby significantly outperforming state-of-the-art methods in decoding success rates, payload capacity, and encoding speed.

Zhihan Cao, Gaolei Li, Jun Wu, Jianhua Li, Hang Zhang, Mingzhe ChenMon, 09 Ma🔢 math

A Survey on Stacked Intelligent Metasurfaces: Fundamentals, Recent Advances, and Challenges

This survey provides a comprehensive overview of stacked intelligent metasurfaces (SIMs), detailing their physical principles, modeling frameworks, and hardware realizations while examining their role in enabling advanced 6G functionalities like wave-domain signal processing, integrated sensing, and cell-free networks, alongside identifying key challenges for future research.

Chandan Kumar Sheemar, Wali Ullah Khan, Sourabh Solanki, George C. Alexandropoulos, Symeon ChatzinotasMon, 09 Ma🔢 math