Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Barata, Joao C. A."'
Autor:
Grossi, Rafael, Barata, João C. A.
We propose a generalization of the description of Bell's inequalities in algebraic quantum field theory (AQFT) to the context of locally covariant quantum field theory (LCQFT). We use the functorial formulation of the state space as proposed in the s
Externí odkaz:
http://arxiv.org/abs/2409.14930
Using a perturbative solution for a periodically driven two-level quantum system, we show how to obtain phase factors for both a two-level quantum system and two two-level quantum systems non-interacting and interacting. The method is easily implemen
Externí odkaz:
http://arxiv.org/abs/1808.08324
Autor:
Barata, João C. A., Brum, Marcos
Publikováno v:
SIGMA 15 (2019), 060, 22 pages
We construct wavepackets on de Sitter spacetime, with masses consistently defined from the eigenvalues of an irreducible representation of a Casimir element in the universal enveloping algebra of the Lorentz algebra and analyse their asymptotic behav
Externí odkaz:
http://arxiv.org/abs/1708.00538
In 1975 Figari, H{\o}egh-Krohn and Nappi constructed the P(phi)_2 model on the de Sitter space. Here we complement their work with new results, as well as by connecting this model to various areas of mathematics. In particular, i.) we discuss the cau
Externí odkaz:
http://arxiv.org/abs/1607.02265
In 1975 by Figari, H{\o}egh-Krohn and Nappi constructed the ${\mathscr P}(\varphi)_2$ model on the two-dimensional de Sitter space. Here we complement their work with a number of new results.
Externí odkaz:
http://arxiv.org/abs/1311.2905
Publikováno v:
Communications in Mathematical Physics 260 (2005), no. 2, 403-443
We consider a perturbed Hill's equation of the form $\ddot \phi + (p_{0}(t) + \epsilon p_{1}(t)) \phi = 0$, where $p_{0}$ is real analytic and periodic, $p_{1}$ is real analytic and quasi-periodic and $\eps$ is a ``small'' real parameter. Assuming Di
Externí odkaz:
http://arxiv.org/abs/math-ph/0410030
Autor:
Barata, Joao C A, Nill, Florian
Publikováno v:
Commun.Math.Phys. 171 (1995) 27-86
Electrically as well as magnetically charged states are constructed in the 2+1-dimensional Euclidean Z_N-Higgs lattice gauge model, the former following ideas of Fredenhagen and Marcu and the latter using duality transformations on the algebra of obs
Externí odkaz:
http://arxiv.org/abs/hep-th/9410229
Akademický článek
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Akademický článek
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Autor:
Nussenzveig, Paulo, Barata, João C. A.
Publikováno v:
Science, 2010 Jun . 328(5985), 1491-1492.
Externí odkaz:
http://dx.doi.org/10.1126/science.1191666
