4 papers
The Contextual Modal Logic of a Wigner's Friend Generalization
Felipe Dilho Alves, João Carlos Alves Barata
Quantum mechanics has been subject to logical scrutiny since its inception. The behavior of quantum systems, which are fundamentally dissimilar from classical systems, often appear…
Noncommutative Lp-Spaces and Perturbations of KMS States
R. Correa da Silva
We extend the theory of perturbations of KMS states to some class of unbounded perturbations using noncommutative Lp-spaces. We also prove certain stability of the domain of the Mo…
The Moore-Penrose Pseudoinverse. A Tutorial Review of the Theory
J. C. A. Barata, M. S. Hussein
In the last decades the Moore-Penrose pseudoinverse has found a wide range of applications in many areas of Science and became a useful tool for physicists dealing, for instance, w…
Localizability in de Sitter space
N. Yokomizo, J. C. A. Barata
An analogue of the Newton-Wigner position operator is defined for a massive neutral scalar field in de Sitter space. The one-particle subspace of the theory, consisting of positive…