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Sobre

Sobre

Sou Professor Catedrático no Departamento de Informática da Universidade do Minho, e investigador sénior no High Assurance Software Laboratory (HASLab INESC TEC). Desde Outubro de 2016, sou Director Adunto da UNU-EGOV, a Operational Unit on Policy-driven Electronic Governance da Universidade das Nações Unidas (egov.unu.edu).

Os meus interesses de investigação estão focados na semântica do fenómeno computacional e no desenvolvimento de cálculos de programs aplicados à compreensão de sistemas e à concepção de software. Estou particularmente interessado em teoria das coálgebras e raciocínio coindutivo, assim como em lógicas modais e híbridas.

Nos últimos anos coordenei quatro projectos de investigação a nível nacional, parcerias bilaterais com o Brasil e China, e fui coordenador no lado português de uma rede ALFA (Europa - América Latina) para formação doutoral. Sou autor de cinco capítulos de livro,  25 artigos em revistas indexadas, e mais de 60 artigos em conferências internacionais. Tendo lecionado em curso de Mestrado e Programas Doutorais nas Universidades de Bristol (Reino Unido), Tartu (Estónia), e Pequim (China), orientei igualmente diversos projectos de doutoramento (seis concluídos; quatro em curso). Um dos meus orientando,  Alexandre Madeira, recebeu o Prémio Científico IBM para 2013, o mais importante prémio científico em Informática em Portugal.

Integrei, por nomeação reitoral,  o grupo que concebeu e implementou o "Joint Doctoral Programme in Computer Science of the Universities of Minho, Aveiro, and Porto" (MAP-i), tendo mais tarde servido como seu director. Sou membro do IFIP WG1.3 (Foundations of System Specification), e, desde Janeiro 2019, coordenador do IFIP Tecnhical Committee TC1 on Foundations of Computer Science.

Actualmente coordeno o Quantum Software Engineering Research Group no INL, o International Iberian Nanotechnology Laboratoryf.

Tópicos
de interesse
Detalhes

Detalhes

  • Nome

    Luís Soares Barbosa
  • Cargo

    Investigador Coordenador
  • Desde

    01 novembro 2011
005
Publicações

2025

Specification of paraconsistent transition systems, revisited

Autores
Cunha, J; Madeira, A; Barbosa, LS;

Publicação
SCIENCE OF COMPUTER PROGRAMMING

Abstract
The need for more flexible and robust models to reason about systems in the presence of conflicting information is becoming more and more relevant in different contexts. This has prompted the introduction of paraconsistent transition systems, where transitions are characterized by two pairs of weights: one representing the evidence that the transition effectively occurs and the other its absence. Such a pair of weights can express scenarios of vagueness and inconsistency. . This paper establishes a foundation for a compositional and structured specification approach of paraconsistent transition systems, framed as paraconsistent institution. . The proposed methodology follows the stepwise implementation process outlined by Sannella and Tarlecki.

2025

Paraconsistency for the Working Software Engineer (Extended Abstract)

Autores
Barbosa, LS;

Publicação
SOFTWARE ENGINEERING AND FORMAL METHODS, SEFM 2024

Abstract
Modelling complex information systems often entails the need for dealing with scenarios of inconsistency in which several requirements either reinforce or contradict each other. This lecture summarises recent joint work with Juliana Cunha, Alexandre Madeira and Ana Cruz on a variant of transition systems endowed with positive and negative accessibility relations, and a metric space over the lattice of truth values. Such structures are called paraconsistent transition systems, the qualifier stressing a connection to paraconsistent logic, a logic taking inconsistent information as potentially informative. A coalgebraic perspective on this family of structures is also discussed.

2025

Exploring a Quantum Programming Language with Concurrency

Autores
Jain, M; Fernandes, V; Madeira, A; Barbosa, LS;

Publicação
Companion Proceedings of the 9th International Conference on the Art, Science, and Engineering of Programming, Programming 2025, June 2-6, 2025, Prague 1, Czechia

Abstract

2025

Bridging resource theory and quantum key distribution: geometric analysis and statistical testing

Autores
D'Urbano, A; de Oliveira, M; Barbosa, LS;

Publicação
QUANTUM INFORMATION PROCESSING

Abstract
Discerning between quantum and classical correlations is of great importance. Bell polytopes are well established as a fundamental tool for such a purpose. In this paper, we extend this line of inquiry by applying resource theory within the context of network scenarios, to a Quantum Key Distribution (QKD) protocol, BBM92. To achieve this, we consider the causal structure P3 to describe the protocol, and we aim to develop useful statistical tests to assess it. Our objectives are twofold: firstly, to utilise the underlying causal structure of the QKD protocol to produce a geometrical analysis of the resulting nonconvex polytope, with a focus on the classical behaviours, and secondly to devise a test within this framework to evaluate the distance between any two behaviours within the generated polytope. This approach offers a unique perspective, linking deviations from expected behaviour directly to the quality of the quantum resource involved or the residual nonclassicality in protocol execution.

2025

Hybrid quantum-classical algorithm for near-optimal planning in POMDPs

Autores
Cunha, G; Ramôa, A; Sequeira, A; Oliveira, Md; Barbosa, LS;

Publicação
CoRR

Abstract

Teses
supervisionadas

2023

Time-structure in measurement-based quantum computation

Autor
Michael de Oliveira

Instituição
UM

2023

Continuous-time Quantum Walks

Autor
Jaime Pereira Santos

Instituição
UM

2023

Timing Constraints in Quantum Programming Languages

Autor
Vítor Emanuel Gonçalves Fernandes

Instituição
UM

2022

Foundations for quantum algorithms and complexity

Autor
Carlos Eduardo Teixeira Tavares

Instituição
UM

2022

Weighted Computations: semantics and program logics

Autor
Leandro Rafael Moreira Gomes

Instituição
UM