Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Dragoljub D. Dimitrijevic"'
Publikováno v:
Filomat. 35:1519-1541
We pointed to 4-dimensional generalized Riemannian spaces important for applications in some parts of physics here. Complete metric tensors and its possibilities to be applied in cosmology are analyzed in this paper. We used the results of N. O. Vesi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a9d2507a523a043b456cf7e3b2189860
https://doi.org/10.2298/fil2105519v
https://doi.org/10.2298/fil2105519v
Publikováno v:
Facta universitatis - series: Physics, Chemistry and Technology. 18:65-73
We study a model of tachyon inflation and its attractor solution in the framework of holographic cosmology. The model is based on a holographic braneworld scenario with a D3-brane located at the holographic boundary of an asymptotic ADS5 bulk. The ta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::15b93788c67867b32c783fc698453681
https://doi.org/10.2298/fupct2001065d
https://doi.org/10.2298/fupct2001065d
Autor:
S Goran Djordjevic, Milan Milosevic, Neven Bilic, Marko Stojanović, Dragoljub D. Dimitrijevic
Publikováno v:
Facta universitatis - series: Physics, Chemistry and Technology. 17:79-87
In this paper we study a tachyon cosmological model based on dynamics of a 3-brane in the second Randall-Sundrum (RSII) model extended to include matter in the bulk. The presence of matter in the bulk changes warp factor which leads to modification o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::69a8285e6b8c51c382eb234b1e60feb2
https://doi.org/10.2298/fupct1901079s
https://doi.org/10.2298/fupct1901079s
In this paper we continue study of tachyon scalar field described by a Dirac-Born-Infeld (DBI) type action with constraints in the cosmological context. The proposed extension of the system introducing an auxiliary field in the minisuperspace framewo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d86c73d42678da2359aaca4ec04fa7cd
http://arxiv.org/abs/1904.11341
http://arxiv.org/abs/1904.11341
Publikováno v:
AIP Conference Proceedings.
In this paper we discuss tachyon scalar field with constraints in the cosmological context. The tachyon field is described by a Dirac-Born-Infeld (DBI) type action. In order to quantize the system using path integral method we propose extension of th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c34d1584b5f77980bec05b53decd60f7
https://doi.org/10.1063/1.5090055
https://doi.org/10.1063/1.5090055
Autor:
Milan Milosevic, Marko Stojanović, Neven Bilic, Dragoljub D. Dimitrijevic, Goran S. Djordjevic
A model of tachyon inflation is proposed in the framework of holographic cosmology. The model is based on a holographic braneworld scenario with a D3-brane located at the holographic boundary of an asymptotic ADS$_5$ bulk. The tachyon field that driv
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6b209ed4cad5c5f0ddd641f798f72adf
http://arxiv.org/abs/1809.07216
http://arxiv.org/abs/1809.07216
Publikováno v:
Serbian Astronomical Journal, Vol 2016, Iss 192, Pp 1-8 (2016)
The role tachyon fields may play in evolution of early universe is discussed in this paper. We consider the evolution of a flat and homogeneous universe governed by a tachyon scalar field with the DBI-type action and calculate the slow-roll parameter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1bac91b572fabd5748d2d012441c17df
http://www.doiserbia.nb.rs/img/doi/1450-698X/2016/1450-698X1600003M.pdf
http://www.doiserbia.nb.rs/img/doi/1450-698X/2016/1450-698X1600003M.pdf
Autor:
Goran S. Djordjevic, Neven Bilic, Marko Stojanović, Milan Milosevic, Dragoljub D. Dimitrijevic
Publikováno v:
AIP Conference Proceedings volume 2075
We present results obtained by a software we developed for computing observational cosmological inflation parameters: the scalar spectral index ($n_s$) and the tensor-to-scalar ratio ($r$) for a standard single field and tachyon inflation, as well as
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::37c3e8a8f9f8a1675f4e7497968dc3a7
Autor:
Dragoljub D. Dimitrijevic, Marko Stojanović, Milan Milosevic, Neven Bilic, Goran S. Djordjevic
We analyze a tachyon cosmological model based on the dynamics of a 3-brane in the bulk of the second Randall–Sundrum model. This model contains extended general warp functions, i.e. generalized bulk geometry. We study a power law warp factor in cos
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::17ef844db1db1bf79d9a5352afd87ca5
https://www.bib.irb.hr/1009573
https://www.bib.irb.hr/1009573
Autor:
Goran S. Djordjevic, Neven Bilić, Marko Stojanović, Milan Milosevic, Dragoljub D. Dimitrijevic
Publikováno v:
AIP Conference Proceedings volume 1722
We discuss the slow-roll parameters of inflation, scalar spectral index n, and tensor-to-scalar ratio r for the model of tachyon inflation in the slow-roll regime. We compare the numerical results obtained for the models with the typical inflationary
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c410666d4e150e45b0950ac727ccd1c9
https://doi.org/10.1063/1.4944143
https://doi.org/10.1063/1.4944143