Zobrazeno 1 - 10
of 98
pro vyhledávání: '"Gumjudpai, Burin"'
Publikováno v:
Phys. Dark Univ. 45, 101542 (2024)
Background cosmological dynamics for a universe with matter, a scalar field non-minimally derivative coupling to Einstein tensor under power-law potential and holographic vacuum energy is considered here. The holographic IR cutoff scale is apparent h
Externí odkaz:
http://arxiv.org/abs/2402.18604
Publikováno v:
Physics of the Dark Universe, Volume 41, August 2023, 101251
We consider a cosmological model of non-minimal derivative coupling (NMDC) to gravity with holographic effect from Bekenstein-Hawking entropy using Hubble horizon IR cutoff. Holographic parameter $c$ is constant in a range, $0 \leq c < 1$. NMDC effec
Externí odkaz:
http://arxiv.org/abs/2204.11609
Autor:
Gumjudpai, Burin
We propose concept of equation of state (EoS) effect structure in form of diagrams and rules. This concept helps justifying EoS status of an empirical relation. We apply the concept to closed system of consumers and we are able to formulate its EoS.
Externí odkaz:
http://arxiv.org/abs/2201.07975
Autor:
Gumjudpai, Burin
We consider demand-side economy. Using Caratheodory's approach, we define empirical existence of equation of state (EoS) and coordinates. We found new insights of thermodynamics EoS, the {\it effect structure}. Rules are proposed as criteria in promo
Externí odkaz:
http://arxiv.org/abs/2012.01505
Autor:
Kaeonikhom, Chakkrit, Rangdee, Phongsaphat, Assadullahi, Hooshyar, Gumjudpai, Burin, Schewtschenko, Jascha A., Wands, David
Publikováno v:
Phys. Rev. D 102, 123519 (2020)
We present a phase-space analysis of the qualitative dynamics cosmologies where dark matter exchanges energy with the vacuum component. We find fixed points corresponding to power-law solutions where the different components remain a constant fractio
Externí odkaz:
http://arxiv.org/abs/2007.12181
Publikováno v:
Physics of the Dark Universe, 30, 100712 (2020)
Non-minimal derivative coupling (NMDC) to gravity in flat FLRW universe is investigated in the scenario of holographic dark energy. Kinetic term is coupled to the Einstein tensor under potential $V = (1/2)m^2 \phi^2$. The free kinetic term is allowed
Externí odkaz:
http://arxiv.org/abs/2004.06214
Publikováno v:
In Physics of the Dark Universe August 2023 41
Publikováno v:
Modern Physics Letters A, Vol. 35, No. 19, 2050157 (2020)
Time-independent non-linear Schr\"{o}dinger-type (NLS) formulation of FRW cosmology with canonical scalar field are considered in case of two barotropic fluids. We derived Friedmann formulation variables in terms of NLS variables. Seven exact solutio
Externí odkaz:
http://arxiv.org/abs/1908.11265
This work critics on nature of thermodynamics coordinates and on roles of the variables in the equation of state (EoS). Coordinate variables in the EoS are analyzed so that central concepts are noticed and are used to lay a foundation in building of
Externí odkaz:
http://arxiv.org/abs/1907.07108
Publikováno v:
Journal of Physics: Conference Series (2018) 1144:012128
We consider cosmological scalar field evolving under exponential potential of the Non-minimal Derivative Coupling (NMDC) gravity model in Palatini formalism. Slow-roll regime is assumed. GR and metric formalism NMDC cases are compared in this study.
Externí odkaz:
http://arxiv.org/abs/1808.10686