Search Results for author: Josep Lumbreras

Found 3 papers, 0 papers with code

Linear bandits with polylogarithmic minimax regret

no code implementations19 Feb 2024 Josep Lumbreras, Marco Tomamichel

We study a noise model for linear stochastic bandits for which the subgaussian noise parameter vanishes linearly as we select actions on the unit sphere closer and closer to the unknown vector.

Learning finitely correlated states: stability of the spectral reconstruction

no code implementations12 Dec 2023 Marco Fanizza, Niklas Galke, Josep Lumbreras, Cambyse Rouzé, Andreas Winter

A refined error bound can be proven for $C^*$-finitely correlated states, which have an operational interpretation in terms of sequential quantum channels applied to the memory system.

Spectral Reconstruction Translation

Quantum contextual bandits and recommender systems for quantum data

no code implementations31 Jan 2023 Shrigyan Brahmachari, Josep Lumbreras, Marco Tomamichel

Using this model we formulate the low energy quantum state recommendation problem where the context is a Hamiltonian and the goal is to recommend the state with the lowest energy.

Multi-Armed Bandits Recommendation Systems

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