35 citations · 35 across the 1 of their papers we have counts for
6 papers
Quantum charges and spacetime topology: The emergence of new superselection sectors
Romeo Brunetti, Giuseppe Ruzzi
In which is developed a new form of superselection sectors of topological origin. By that it is meant a new investigation that includes several extensions of the traditional framew…
Superselection Sectors and General Covariance.I
Romeo Brunetti, Giuseppe Ruzzi
This paper is devoted to the analysis of charged superselection sectors in the framework of the locally covariant quantum field theories. We shall analize sharply localizable charg…
General Covariance in Algebraic Quantum Field Theory
Romeo Brunetti, Martin Porrmann, Giuseppe Ruzzi
In this review we report on how the problem of general covariance is treated within the algebraic approach to quantum field theory by use of concepts from category theory. Some new…
Homotopy of posets, net-cohomology and superselection sectors in globally hyperbolic spacetimes
Giuseppe Ruzzi
We study sharply localized sectors, known as sectors of DHR-type, of a net of local observables, in arbitrary globally hyperbolic spacetimes with dimension . We show that t…
Punctured Haag duality in locally covariant quantum field theories
Giuseppe Ruzzi
We investigate a new property of nets of local algebras over 4-dimensional globally hyperbolic spacetimes, called punctured Haag duality. This property consists in the usual Haag d…
Essential Properties of the Vacuum Sector for a Theory of Superselection Sectors
Giuseppe Ruzzi
As a generalization of DHR analysis, the superselection sectors are studied in the case of absence of the spectrum condition for the reference representation. Considered a net of l…