Quantum-enhanced reinforcement learning

Giorno 23 aprile 2021, con inizio alle ore 15:00, nell'ambito del ciclo di seminari del CMQT coordinato dal Prof. G. Falci, la Dott.ssa Valeria Saggio (Vienna Center for Quantum Science and Technology (VCQ), University of Vienna, Austria) terrà un seminario dal titolo Quantum-enhanced reinforcement learning.

Il seminario inaugura la serie degli Alumni Colloquia, seminari tenuti da ex allievi ed allieve del DFA, oggi impegnati in attività di ricerca presso altre Università ed Enti di ricerca.

Abstract. The field of artificial intelligence (AI) has experienced major developments over the last decade. Within AI, of particular interest is the paradigm of reinforcement learning (RL), where autonomous agents learn to accomplish a given task via feedback exchange with the world they are placed in, called an environment. Thanks to impressive advances in quantum technologies, the idea of using quantum physics to boost the performance of RL agents has been recently drawing the attention of many scientists. In my talk I will focus on the bridge between RL and quantum mechanics, and show how RL has proven amenable to quantum enhancements. I will provide an overview of the most recent results — for example, the development of agents deciding faster on their next move [1]— and I will then focus on how the learning time of an agent can be reduced using quantum physics. I will show that such a reduction can be achieved and quantified only if the agent and the environment can also interact quantumly, that is, if they can communicate via a quantum channel [2]. This idea has been implemented on a quantum platform that makes use of single photons as information carriers. The achieved speed-up in the agent’s learning time, compared to the fully classical picture, confirms the potential of quantum technologies for future RL applications.

[1] Sriarunothai, T. et al. Quantum Science and Technology 4, 015014 (2018).
[2] Saggio, V. et al. Nature 591, 229–233 (2021).

(Picture credits: © Rolando Barry, University of Vienna)

Venerdì, 23 Aprile, 2021