Zobrazeno 1 - 10
of 132
pro vyhledávání: '"ALBERTO IBORT"'
Autor:
Florio M. Ciaglia, Fabio Di Cosmo, Alberto Ibort, Giuseppe Marmo, Luca Schiavone, Alessandro Zampini
Publikováno v:
Entropy, Vol 24, Iss 1, p 75 (2022)
This paper begins the study of the relation between causality and quantum mechanics, taking advantage of the groupoidal description of quantum mechanical systems inspired by Schwinger’s picture of quantum mechanics. After identifying causal structu
Externí odkaz:
https://doaj.org/article/71bc572f10e14a8aa546937c22d38585
Autor:
Florio M. Ciaglia, Fabio Di Cosmo, Alberto Ibort, Giuseppe Marmo, Luca Schiavone, Alessandro Zampini
Publikováno v:
Symmetry, Vol 14, Iss 1, p 70 (2022)
As the space of solutions of the first-order Hamiltonian field theory has a presymplectic structure, we describe a class of conserved charges associated with the momentum map, determined by a symmetry group of transformations. A gauge theory is dealt
Externí odkaz:
https://doaj.org/article/602a5498f47c45dd881ac682c68bf7aa
Publikováno v:
Entropy, Vol 22, Iss 11, p 1292 (2020)
The evolution of states of the composition of classical and quantum systems in the groupoid formalism for physical theories introduced recently is discussed. It is shown that the notion of a classical system, in the sense of Birkhoff and von Neumann,
Externí odkaz:
https://doaj.org/article/78db50e999db408095442cd2bd693abd
Autor:
Alberto Ibort, Miguel A. Rodríguez
Publikováno v:
Symmetry, Vol 11, Iss 3, p 414 (2019)
In this paper, both the structure and the theory of representations of finite groupoids are discussed. A finite connected groupoid turns out to be an extension of the groupoids of pairs of its set of units by its canonical totally disconnected isotro
Externí odkaz:
https://doaj.org/article/c20f0eb5eff0444392a5f842a60eba92
Publikováno v:
Journal of Function Spaces, Vol 2016 (2016)
The use of unitary invariant subspaces of a Hilbert space H is nowadays a recognized fact in the treatment of sampling problems. Indeed, shift-invariant subspaces of L2(R) and also periodic extensions of finite signals are remarkable examples where t
Externí odkaz:
https://doaj.org/article/55013592228d41a6b70d68c42b58ccf5
Publikováno v:
Symmetry, Integrability and Geometry: Methods and Applications, Vol 6, p 052 (2010)
In the present work we review the twisted field construction of quantum field theory on noncommutative spacetimes based on twisted Poincaré invariance. We present the latest development in the field, in particular the notion of equivalence of such q
Externí odkaz:
https://doaj.org/article/77c40e66c3674629807d26ac20f4a9b9
Autor:
Arturo Konderak, Paolo Facchi, Fabio Di Cosmo, Florio M. Ciaglia, Alberto Ibort, Giuseppe Marmo
It is well known that certain features of a quantum theory cannot be described in the standard picture on a Hilbert space. In particular, this happens when we try to formally frame a quantum field theory, or a thermodynamic system with finite density
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fcf31c54a1d77bf91d9a067d2ef26ccf
http://arxiv.org/abs/2302.01050
http://arxiv.org/abs/2302.01050
The notion of L-boundary, a new causal boundary proposed by R. Low based on constructing a `sky at infinity' for any light ray, is discussed in detail. The analysis of the notion of L-boundary will be done in the 3-dimensional situation for the ease
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8a2f52847877617031a664ac9679c789
http://arxiv.org/abs/2207.01292
http://arxiv.org/abs/2207.01292
In this paper the problem of tomographic reconstruction of states is investigated within the so-called Schwinger's picture of Quantum Mechanics in which a groupoid is associated with every quantum system. The attention is focused on spin tomography:
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1c632f084192c3b9fec573efafd6f935
http://arxiv.org/abs/2205.00170
http://arxiv.org/abs/2205.00170
Autor:
Zampini, Florio M. Ciaglia, Fabio Di Cosmo, Alberto Ibort, Giuseppe Marmo, Luca Schiavone, Alessandro
Publikováno v:
Entropy; Volume 24; Issue 1; Pages: 75
This paper begins the study of the relation between causality and quantum mechanics, taking advantage of the groupoidal description of quantum mechanical systems inspired by Schwinger’s picture of quantum mechanics. After identifying causal structu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=multidiscipl::ff1f5fd471ef019d0b92e71634fea4dc