Null Fluid Collapse in Rastall Theory of Gravity
Sign Up to like & getrecommendations! Published in 2020 at "Annalen der Physik"
DOI: 10.1002/andp.202000064
Abstract: A Vaidya spacetime is considered for gravitational collapse of a type II fluid in the context of the Rastall theory of gravity. For a linear equation of state for the fluid profiles, the conditions under… read more here.
Keywords: theory gravity; fluid; collapse; rastall theory ... See more keywords
Effective field theory of gravity to all orders
Sign Up to like & getrecommendations! Published in 2019 at "Journal of High Energy Physics"
DOI: 10.1007/jhep05(2020)083
Abstract: We construct the general effective field theory of gravity coupled to the Standard Model of particle physics, which we name GRSMEFT. Our method allows the systematic derivation of a non-redundant set of operators of arbitrary… read more here.
Keywords: field; effective field; gravity; field theory ... See more keywords
Clifford Algebras, Multipartite Systems and Gauge Theory Gravity
Sign Up to like & getrecommendations! Published in 2018 at "Advances in Applied Clifford Algebras"
DOI: 10.1007/s00006-018-0917-0
Abstract: In this paper we present a multipartite formulation of gauge theory gravity based on the formalism of space–time algebra for gravitation developed by Lasenby and Doran (Philos Trans R Soc Lond A 582:356–487, 1998). We… read more here.
Keywords: multipartite systems; theory gravity; algebras multipartite; clifford algebras ... See more keywords
A comparative study of cosmological models in alternative theory of gravity with LVDP & BVDP
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DOI: 10.1007/s10509-017-3117-9
Abstract: In this communication we have presented a comparative study of Friedmann-Lemaître-Robertson-Walker (FLRW) cosmological models in alternative theory of gravity with linearly varying deceleration parameter (LVDP) and bilinearly varying deceleration parameter (BVDP) as suggested by Mishra… read more here.
Keywords: law; cosmological models; models alternative; alternative theory ... See more keywords
Cosmological models with EoS parameters in f(T) theory of gravity
Sign Up to like & getrecommendations! Published in 2020 at "Indian Journal of Physics"
DOI: 10.1007/s12648-020-01691-w
Abstract: We have presented cosmological models with equation of state (EoS) parameters in $$f(T)$$ f ( T ) theory of gravity, which is an extension of the teleparallel theory of gravity, where T is the torsion… read more here.
Keywords: models eos; cosmological models; eos parameters; theory gravity ... See more keywords
Tilted cosmological models in f(T) theory of gravity
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DOI: 10.1007/s12648-020-01830-3
Abstract: We have presented tilted cosmological models in f ( T ) theory of gravity. f ( T ) theory is an extension of teleparellel theory of gravity, where T is the torsion scalar. We solve… read more here.
Keywords: tilted cosmological; cosmological models; gravity; models theory ... See more keywords
Absence of cosmological constant problem in special relativistic field theory of gravity
Sign Up to like & getrecommendations! Published in 2018 at "Annals of Physics"
DOI: 10.1016/j.aop.2018.08.016
Abstract: The principles of quantum field theory in flat spacetime suggest that gravity is mediated by a massless particle with helicity $\pm2$, the so-called graviton. It is regarded as textbook knowledge that, when the self-coupling of… read more here.
Keywords: theory; theory gravity; field theory; general relativity ... See more keywords
Accelerating universe with varying Λ in ( ) theory of gravity
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DOI: 10.1016/j.newast.2020.101476
Abstract: Abstract In this paper we have investigated Bianchi Type- I cosmological model with varying cosmological constant Λ in f(R, T) theory of gravity. In order to obtain an exact solution of the field equations, we… read more here.
Keywords: universe varying; varying theory; theory gravity; model ... See more keywords
Early Universe in view of a modified theory of gravity
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DOI: 10.1088/1361-6382/abc222
Abstract: We study the quantum evolution of the early universe, its semi-classical analogue together with inflationary regime, in view of a generalized modified theory of gravity. The action is built by supplementing the nonminimally coupled scalar-tensor… read more here.
Keywords: modified theory; term; view; theory gravity ... See more keywords
Black hole gravitational waves in the effective field theory of gravity
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DOI: 10.1103/physrevd.102.024079
Abstract: We investigate the propagation of gravitational waves on a black hole background within the low energy effective field theory of gravity, where effects from heavy fields are captured by higher dimensional curvature operators. Depending on… read more here.
Keywords: black hole; gravitational waves; effective field; field theory ... See more keywords
Warm inflation in general scalar-tensor theory of gravity
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DOI: 10.1103/physrevd.105.083501
Abstract: : In this work, we investigate warm inflationary models in the context of a general scalar-tensor theory of gravity which is coupled to radiation through a dissipation term. We first derive the potential of exponential… read more here.
Keywords: scalar tensor; tensor theory; theory gravity; general scalar ... See more keywords