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Haibin Ling

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#machine learning Preprint Sep 2026

Conservation Buys Stability and Factoring Buys Counterfactuals in Physical World Models

A learned simulator can reproduce its training conditions accurately yet fail in two distinct ways once those conditions change. Over long rollouts, small errors accumulate until the trajectory drifts away from physically plausible behavior; under an intervention on a physical parameter, the model may continue to follo...

Yu-Feng Wang, Parivesh Priye, Lu Wei et al. · 0 citations
#machine learning Preprint Sep 2026

GRPO-QPS: Target-Preserving Reinforcement Learning for Quantum Posterior Sampling

Bayesian quantum tomography requires efficient inference while preserving a posterior fixed by the prior and Born likelihood. Learned transport provides fast amortized samples, but reward tuning can reshape the generated distribution rather than improve exploration of this fixed target. We introduce GRPO-QPS, a target-...

Yu-Feng Wang, Parivesh Priye, Lu Wei et al. · 0 citations
Preprint Jul 2026

Grounding Spatial Relations in a Compact World Model: Instruction Leakage and a Goal-Free Dynamics Fix

The diagnosis prescribes the fix: keep the goal out of the dynamics and supervise the \emph{read} path, recovering genuine, instruction-independent grounding, and the detection protocol and remedy apply to any goal-conditioned world model whose instruction names the scored quantity.

Yufeng Wang, Lu Wei, Haibin Ling · 0 citations

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