Zobrazeno 1 - 10
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pro vyhledávání: '"Leandro G Gomes"'
Publikováno v:
Classical and Quantum Gravity. 39:225008
In this manuscript we investigate the intrinsically flat (space-flat) spacetimes as viable cosmological models. We show that they have a natural geometric structure which is suitable to describe inhomogeneous matter distributions forming a periodic p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b1ca770d012261c05297ed466fe1f0a1
https://doi.org/10.1088/1361-6382/ac96c3
https://doi.org/10.1088/1361-6382/ac96c3
Autor:
Leandro G. Gomes
Publikováno v:
Classical and Quantum Gravity. 39:027001
In this manuscript, we investigate the patterns of the cosmological anisotropy in the spatially flat Bianchi models filled with a perfect fluid. We analyse the factor 1 + Δ R , the ratio of the Hubble parameter in the anisotropic model over its isot
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2ddf821fd65acb8d498dd4a624f6dcad
https://doi.org/10.1088/1361-6382/ac3ae1
https://doi.org/10.1088/1361-6382/ac3ae1
Publikováno v:
International Journal of Modern Physics D. 30:2150033
Based upon the intrinsic symmetries approach to inhomogeneous cosmologies, we propose an exact solution to Einstein's field equations where the spatial sections are flat and the source is a non-perfect fluid such that the dissipative terms can be wri
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https://explore.openaire.eu/search/publication?articleId=doi_dedup___::73bc3aa37ecbe7b86028349408a60dd5
https://doi.org/10.1142/s0218271821500334
https://doi.org/10.1142/s0218271821500334
We investigate diagonal Bianchi-I spacetimes in the presence of viscous fluids by using the shear and the anisotropic pressure components as the basic variables, where the viscosity is driven by the (second-order) causal thermodynamics. A few exact s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5e20ecad0388742f9f91bc20f5b54db2
http://arxiv.org/abs/1610.00020
http://arxiv.org/abs/1610.00020
This paper addresses the interplay between vacuum and thermal local averages for massless scalar radiation near a plane wall of a large cavity where the Dirichlet boundary condition is assumed to hold. The main result is that stable thermodynamic equ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::89f896d7c488b54bcb00aef411489364
http://arxiv.org/abs/1304.6041
http://arxiv.org/abs/1304.6041
Autor:
Michael Forger, Leandro G. Gomes
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
We propose new definitions of the concepts of a multisymplectic structure and of a polysymplectic structure which extend previous ones so as to cover the cases that are of interest in mathematical physics: they are tailored to apply to fiber bundles,
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https://explore.openaire.eu/search/publication?articleId=doi_dedup___::13742d361d4f7517a21ed46428105d8c
The linearized Einstein field equations with the renormalized stress tensor of a massless quantum scalar field as source are solved in the 4-dimensional spacetime near an infinite plane boundary. The motion of particles and light is investigated disc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::40fdc28ba420cbf7c20db6e5f152b94e
http://arxiv.org/abs/1107.2835
http://arxiv.org/abs/1107.2835
Publikováno v:
Classical & Quantum Gravity; 2/23/2017, Vol. 34 Issue 4, p1-1, 1p
Publikováno v:
Journal of High Energy Physics
The mean square fluctuation and the expectation value of the stress-energy-momentum tensor of a neutral massive scalar field at finite temperature are determined near an infinite plane Dirichlet wall, and also near an infinite plane Neumann wall. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2cedbf0220b0ecf81f68f2d63b27e3fe
Autor:
FORGER, MICHAEL, GOMES, LEANDRO G.
Publikováno v:
Reviews in Mathematical Physics; Oct2013, Vol. 25 Issue 9, p1-47, 47p