O Departamento de Física da UFPE promove na próxima sexta-feira (11), às 16h, o webinário “Replica Symmetry Breaking in Random Lasers: the experimental test of the Parisi theory”, com apresentação do professor Claudio Conti, da University Sapienza Rome, na Itália. O webnário acontece via plataforma Google Meet. Os organizadores do evento pedem para que os interessados entrem na sala virtual com o microfone desligado e pelo e-mail institucional (@ufpe.br)

Claudio Conti é diretor do Instituto de Sistemas Complexos do Conselho Nacional de Pesquisa (ISC-NRC) e chefe do Laboratório de Fotônica Não linear do Departamento de Física da Universidade Sapienza em Roma (IT). Ele é autor de mais de 200 artigos em fotônica, sistemas não lineares e complexos.

Resumo

We review our work on complex photonic systems and their link with spin glass theory. We show that models that have been the subject of intense research for decades, as the Ising Hamiltonian, have a significant and unexpected role in modern photonics. This mapping holds to random lasers and nonlinear light propagation. One specific outcome is the existence of phase transitions, named replica symmetry breaking, which we observed in different experiments, and enabled the first direct measurement of the overlap of Parisi (Nobel Prize in Physics 2021). The link with spin glass theory allows using multimodal optical systems to solve combinatorial optimization. Indeed NP-hard computational problems, such as number partitioning or max-cut, also are described by Ising Hamiltonians. I show that simple optical systems with a single spatial light modulator may enable optical computing and “Ising machines” with millions of spins.