A hybrid classical-quantum approach to speed-up Q-learning

Author:

Sannia A.,Giordano A.,Gullo N. Lo,Mastroianni C.,Plastina F.

Abstract

AbstractWe introduce a classical-quantum hybrid approach to computation, allowing for a quadratic performance improvement in the decision process of a learning agent. Using the paradigm of quantum accelerators, we introduce a routine that runs on a quantum computer, which allows for the encoding of probability distributions. This quantum routine is then employed, in a reinforcement learning set-up, to encode the distributions that drive action choices. Our routine is well-suited in the case of a large, although finite, number of actions and can be employed in any scenario where a probability distribution with a large support is needed. We describe the routine and assess its performance in terms of computational complexity, needed quantum resource, and accuracy. Finally, we design an algorithm showing how to exploit it in the context of Q-learning.

Funder

Spanish State Research Agency, through the QUARESC project

Severo Ochoa and Marı́a de Maeztu Program for Centers and Units of Excellence in R&D

CAIB QUAREC project

Italian MUR Ministry, PNRR National Centre on HPC, Big Data and Quantum Computing,

Publisher

Springer Science and Business Media LLC

Subject

Multidisciplinary

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