The Single-Copy Quantum Bandit Is Classical: An Exact Spectral Collapse

arXiv:2609.40339 · quant-ph · Submitted 2026-09-30 · Read on arXiv

quant-ph

Submitted: 2026-09-30

Updated: 2026-09-30

Terminology

• Regret — 32× in this paper · explained in 3 episodes
• Consistency — 4× in this paper · explained in 3 episodes
• Adaptivity — 3× in this paper · explained in 1 episode
• Additivity — 3× in this paper · explained in 1 episode
• Error Exponents — 3× in this paper · explained in 2 episodes
• Hilbert Space — 3× in this paper · explained in 2 episodes
• Contextual Bandits — 2× in this paper · explained in 3 episodes
• Generalization — 2× in this paper · explained in 13 episodes
• Amortization — 1× in this paper · explained in 1 episode
• Core — 1× in this paper · explained in 2 episodes
• Minimax Regret — 1× in this paper · explained in 2 episodes
• Non-asymptotic Analysis — 1× in this paper · explained in 2 episodes
• Redundancy — 1× in this paper · explained in 2 episodes

Sources

• Optimal Error Exponents for Composite Sequential Quantum Hypothesis Testing
• Learning pure quantum states (almost) without regret
• Learning Pure Quantum States in Any Dimension (Almost) Without Regret
• Bandits roaming Hilbert space
• Generalised quantum Sanov theorem revisited

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