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John C. S. Lui

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#machine learning Preprint Aug 2026

Quantum Multi-Armed Bandits and Linear Bandits: Lower Bounds and Algorithms

We study quantum multi-armed bandits (QMAB) and quantum linear bandits (QLB), where the learner queries each arm or action through a quantum reward oracle or its inverse. Prior work gives algorithms over horizon $T$ with regret $O(K\log T)$ for QMAB with $K$ arms and $O(d^2\operatorname{polylog} T)$ for $d$-dimensional...

Maoli Liu, Zhuohua Li, John C. S. Lui · 0 citations
Jul 2026

Tokenizing Numerical and Embedding Features for LLM RecSys

Experiments on three Amazon recommendation benchmarks show that soft-token fusion improves retrieval performance over LLM-based baselines, and that interaction-based fusion is more effective than direct concatenation of heterogeneous soft tokens.

Zhe Xu, Ankit Peshin, Chiyu Zhang et al. · 0 citations

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