16 citations · 125 across the 34 of their papers we have counts for
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Charges in light cones and quenched infrared radiation
Detlev Buchholz, Fabio Ciolli, Giuseppe Ruzzi +1
The creation of electrically charged states and the resulting electromagnetic fields are considered in space-time regions in which such experiments can actually be carried out, nam…
Twisting factors and fixed-time models in quantum field theory
Ezio Vasselli
We construct a class of fixed-time models in which the commutations relations of a Dirac field with a bosonic field are non-trivial and depend on the choice of a given distribution…
Where charged sectors are localizable: a viewpoint from covariant cohomology
Fabio Ciolli, Giuseppe Ruzzi, Ezio Vasselli
Given a Haag-Kastler net on a globally hyperbolic spacetime, one can consider a family of regions where quantum charges are supposed to be localized. Assuming that the net fulfils…
Gauss's law, the manifestations of gauge fields, and their impact on local observables
Detlev Buchholz, Fabio Ciolli, Giuseppe Ruzzi +1
Within the framework of the universal algebra of the electromagnetic field, the impact of globally neutral configurations of external charges on the field is analyzed. External cha…
The universal algebra of the electromagnetic field III. Static charges and emergence of gauge fields
Detlev Buchholz, Fabio Ciolli, Giuseppe Ruzzi +1
A universal C*-algebra of gauge invariant operators is presented, describing the electromagnetic field as well as operations creating pairs of static electric charges having opposi…
Aharonov-Bohm superselection sectors
Claudio Dappiaggi, Giuseppe Ruzzi, Ezio Vasselli
We show that the Aharonov-Bohm effect finds a natural description in the setting of QFT on curved spacetimes in terms of superselection sectors of local observables. The extension…
Background potentials and superselection sectors
Ezio Vasselli
The basic aspects of the Aharonov-Bohm effect can be summarized by the remark that wavefunctions become sections of a line bundle with a flat connection (that is, a "flat potential…
Linking numbers in local quantum field theory
Detlev Buchholz, Fabio Ciolli, Giuseppe Ruzzi +1
Linking numbers appear in local quantum field theory in the presence of tensor fields, which are closed two-forms on Minkowski space. Given any pair of such fields, it is shown tha…
The universal C*-algebra of the electromagnetic field II. Topological charges and spacelike linear fields
Detlev Buchholz, Fabio Ciolli, Giuseppe Ruzzi +1
Conditions for the appearance of topological charges are studied in the framework of the universal C*-algebra of the electromagnetic field, which is represented in any theory descr…
The universal C*-algebra of the electromagnetic field
Detlev Buchholz, Fabio Ciolli, Giuseppe Ruzzi +1
A universal C*-algebra of the electromagnetic field is constructed. It is represented in any quantum field theory which incorporates electromagnetism and expresses basic features o…
QED Representation for the Net of Causal Loops
Fabio Ciolli, Giuseppe Ruzzi, Ezio Vasselli
The present work tackles the existence of local gauge symmetries in the setting of Algebraic Quantum Field Theory (AQFT). The net of causal loops, previously introduced by the auth…
Presheaves of superselection structures in curved spacetimes
Ezio Vasselli
We show that superselection structures on curved spacetimes, that are expected to describe quantum charges affected by the underlying geometry, are categories of sections of preshe…
Causal posets, loops and the construction of nets of local algebras for QFT
Fabio Ciolli, Giuseppe Ruzzi, Ezio Vasselli
We provide a model independent construction of a net of C*-algebras satisfying the Haag-Kastler axioms over any spacetime manifold. Such a net, called the net of causal loops, is c…
Representations of nets of C*-algebras over S^1
Giuseppe Ruzzi, Ezio Vasselli
In recent times a new kind of representations has been used to describe superselection sectors of the observable net over a curved spacetime, taking into account of the effects of…