5 papers
When Does Forecasting Reveal Temporal Structure? A Stability Analysis of Time-Series Structural Selection
Qipeng Qian, Yuntao Qian
Forecast accuracy is often used as a proxy for temporal structure discovery, but predictive performance and structural identifiability are not equivalent. Different temporal mechan…
Information-Calibrated Quantum Diffusion: Aligning Forward Noise with Reverse Recoverability
Qipeng Qian, Yuntao Qian
Quantum diffusion models typically parameterize forward corruption by raw channel strength, even though this parameter does not directly quantify how much ensemble information is e…
Channel-Constrained Information Scheduling for Quantum Diffusion
Qipeng Qian, Yuntao Qian
Information-based diffusion schedules organize the reverse problem by prescribing how much source information remains after each forward step. For mixed-state quantum diffusion, de…
Hulls and sums of separable constacyclic codes over and new quantum codes
Yu Qian, Yu Wang, Liqi Wang
We establish the generator polynomials of the Euclidean and Hermitian duals of separable constacyclic codes over , w…
Covert Block-Activity Information Transmission over Thermal-Loss Bosonic Channels: Latency--Payload Limits and Finite-Key Achievability
Qipeng Qian, Yuntao Qian
We study covert block-activity information transmission over a thermal-loss bosonic channel, where messages are encoded in weight-constrained activity patterns that Bob must recove…