Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Shuvendu Chakraborty"'
Autor:
Sibnath Deb, Nidup Dorji, Samarjit Kar, Aleena Maria Sunny, Shayana Deb, Saugat Ghosh, Shuvendu Chakraborty
Publikováno v:
Journal of Affective Disorders Reports, Vol 12, Iss , Pp 100502- (2023)
Background: COVID-19 pandemic causes serious threats to physical health and triggers wide varieties of psychological problems, including anxiety and depression. Youth exhibit a greater risk of developing psychological distress, especially during epid
Externí odkaz:
https://doaj.org/article/58d69545172a4977897165f7ebeda627
Publikováno v:
International Journal of Modern Physics A. 37
This work is devoted to study the roles of Dirac–Born–Infeld (DBI)-essence, scalar field, phantom field, normal tachyonic field and phantom tachyonic field models driving the present expansion of the universe with acceleration in anisotropic back
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::abe83da3e9cce6a21e5945d14f547bf2
https://doi.org/10.1142/s0217751x22501986
https://doi.org/10.1142/s0217751x22501986
Publikováno v:
International Journal of Modern Physics A. 36
Modified gravity models are popular among cosmologists, as they can describe the cosmological evolution quite efficiently. Reconstruction of newly introduced [Formula: see text] gravity, with the help of ordinary, power-law entropy corrected and loga
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::03b5e542cab6c924d71451793d0a8013
https://doi.org/10.1142/s0217751x21501980
https://doi.org/10.1142/s0217751x21501980
Publikováno v:
International Journal of Theoretical Physics. 52:3353-3365
In this work, we have studied the Brans-Dicke (BD) cosmology in anisotropic models. We present three dimensional dynamical system describing the evolution of anisotropic models containing perfect fluid and BD scalar field with self-interacting potent
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::72866b8c31dc98c9672f11f3e285825f
https://doi.org/10.1007/s10773-013-1632-1
https://doi.org/10.1007/s10773-013-1632-1
Publikováno v:
International Journal of Theoretical Physics. 52:654-667
In this work, we have considered the entropy-corrected new agegraphic dark energy (ECNADE) model in Hořava-Lifshitz gravity in FRW universe. We have discussed the correspondence between ECNADE and other dark energy models such as DBI-essence, Yang-M
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c162987f8387ade66c0b8f2524582c51
https://doi.org/10.1007/s10773-012-1373-6
https://doi.org/10.1007/s10773-012-1373-6
Autor:
Ujjal Debnath, Shuvendu Chakraborty
Publikováno v:
Canadian Journal of Physics. 90:131-135
In this work, we have considered FRW model of the universe for Brans-Dicke (BD) theory with BD scalar field as a Chameleon field. First we have transformed the field equations and conservation equation from Jordan's frame to Einstein's frame. We have
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ad0a1d4454033c76cb1b5c05938a9fb3
https://doi.org/10.1139/p11-150
https://doi.org/10.1139/p11-150
Autor:
Shuvendu Chakraborty, Ujjal Debnath
Publikováno v:
International Journal of Theoretical Physics. 51:1224-1238
In this work, we have analyzed two scenarios namely, "intermediate" and "logamadiate" scenarios for closed, open and flat anisotropic universe in presence of phantom field, normal tachyonic field and phantom tachyonic field. We have assumed that ther
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4606ac38549c6d3892b170ceb7374aa6
https://doi.org/10.1007/s10773-011-0998-1
https://doi.org/10.1007/s10773-011-0998-1
Autor:
Shuvendu Chakraborty, Ujjal Debnath
Publikováno v:
Gravitation and Cosmology. 17:280-283
In this paper we have considered an anisotropic space-time model of the Universe in presence of Brans-Dicke (BD) scalar field $\phi$, causal viscous fluid and barotropic fluid. We have shown that irrespective of fluid the causality theory provides la
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::55fc1cff792163e3e32262ae1b3b7380
https://doi.org/10.1134/s0202289311030029
https://doi.org/10.1134/s0202289311030029
Autor:
Shuvendu Chakraborty, Ujjal Debnath
Publikováno v:
International Journal of Modern Physics D. 19:2071-2078
In this work, we have considered a noncanonical complex scalar field named hessence to play the role of quintom in anisotropic universe (particularly in the Bianchi I model) as a new approach to look into the unknown mysterious world of dark energy.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b123a518fadf580e5732df922c766dc9
https://doi.org/10.1142/s0218271810018220
https://doi.org/10.1142/s0218271810018220
Autor:
Ujjal Debnath, Shuvendu Chakraborty
Publikováno v:
International Journal of Theoretical Physics. 50:80-87
In this work, we have considered that the anisotropic universe is filled with normal matter and phantom field (or tachyonic field). We have chosen the exponential forms of scale factors a and b in such a way that there is no singularity for evolution
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d80adc23b81d05b64fc59b059c599fec
https://doi.org/10.1007/s10773-010-0495-y
https://doi.org/10.1007/s10773-010-0495-y