Author

Xin Qiu

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Preprint Aug 2026

Beyond the Best Guess: Improving LLM Solution Coverage with Evolution Strategies

Evolution Strategies (ES), a population-based, gradient-free post-training method that optimizes directly in weight space through random perturbations, achieves consistently higher pass@k than RL and produces a broader output distribution with greater solution coverage.

Conor F. Hayes, Elliot Meyerson, Kajetan Schweighofer et al. · 2 citations

Preprint Jul 2026

Simple-to-Complex Structured Demonstrations for Vision-Language-Action Learning

This work proposes a simple-to-complex structured demonstration collection strategy for VLA learning using a dual-arm robotic platform that enables VLA models to first acquire fundamental manipulation skills before learning increasingly complex task compositions, facilitating more effective learning of long-horizon man...

Xin Qiu, Yi Yu · 0 citations