Author

Sitan Chen

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#machine learning Preprint Sep 2026

Blackboard Intelligence Can Surpass Autoregressive on Globally Constrained Problems

Next-token prediction has driven remarkable progress in large language models, yet a growing body of evidence suggests that they can struggle on problems governed by complex global constraints. In this work, we focus on this regime and ask whether some of these limitations arise from the inference interface induced by...

Woosang Jeon, Jaeyeon Kim, S. Kakade et al. · 0 citations

Jul 2026

Online Shadow Tomography Matching the Classical Bounds

In Online Shadow Tomography, we are given copies of an unknown $d$-dimensional quantum state $\rho$, an adversary (adaptively) proposes a sequence of bounded observables $A^{(1)},\ldots,A^{(m)}$, and after each $A^{(t)}$ is given we must estimate $\mathrm{Tr}(A^{(t)}\rho)$ to within $\pm \epsilon$. This is the direct q...

Sitan Chen, R. O'Donnell, Angelos Pelecanos et al. · arXiv.org · 1 citation · ⚡1