scholarly journals A single scalar field model of dark energy with equation of state crossing −1

2005 ◽  
Vol 2005 (12) ◽  
pp. 002-002 ◽  
Author(s):  
Mingzhe Li ◽  
Bo Feng ◽  
Xinmin Zhang
Keyword(s):  
Dark Energy ◽  
Scalar Field ◽  
Equation Of State ◽  
Field Model ◽  
Scalar Field Model

scholarly journals Some remarks on the observational constraints on the self-interacting scalar field model for dark energy

2010 ◽  
Vol 89 (6) ◽  
pp. 69002 ◽  
Author(s):  
J. C. Fabris ◽  
D. F. Jardim
Keyword(s):  
Dark Energy ◽  
Scalar Field ◽  
Field Model ◽  
The Self ◽  
Observational Constraints ◽  
Scalar Field Model

scholarly journals Two-scalar-field model for the interaction of dark energy and dark matter

2012 ◽  
Vol 86 (10) ◽  
Author(s):  
Orfeu Bertolami ◽  
Pedro Carrilho ◽  
Jorge Páramos
Keyword(s):  
Dark Matter ◽  
Dark Energy ◽  
Scalar Field ◽  
Field Model ◽  
Scalar Field Model

scholarly journals A COMPARISON OF QUINTESSENCE AND NON-LINEAR BORN–INFELD SCALAR FIELD USING GOLD SUPERNOVA DATA

2006 ◽  
Vol 15 (11) ◽  
pp. 1947-1961 ◽  
Author(s):  
WEI FANG ◽  
H. Q. LU ◽  
B. LI ◽  
K. F. ZHANG
Keyword(s):  
Scalar Field ◽  
Equation Of State ◽  
Field Model ◽  
State Parameter ◽  
Scale Factor ◽  
Scalar Field Model ◽  
Equation Of State Parameter ◽  
Non Linear ◽  
Quintessence Model

We study the Non-Linear Born–Infeld (NLBI) scalar field model and quintessence model with two different potentials (V(ϕ) = -sϕ and [Formula: see text]). We investigate the differences between these two models. We explore the equation of state parameter w and the evolution of scale factor a(t) in both the NLBI scalar field and quintessence model. The present age of universe and the transition redshift are also obtained. We use the Gold dataset of 157 SN-Ia to constrain the parameters of the two models. All the results show that the NLBI model is slightly superior to the quintessence model.

scholarly journals Ghost Chaplygin scalar field model of dark energy

2013 ◽  
Vol 91 (1) ◽  
pp. 54-59 ◽  
Author(s):  
F. Adabi ◽  
K. Karami ◽  
M. Mousivand
Keyword(s):  
Dark Energy ◽  
Scalar Field ◽  
Field Model ◽  
Accelerated Expansion ◽  
Scalar Field Model ◽  
Ghost Dark Energy ◽  
Energy Models ◽  
Expansion Of The Universe ◽  
The Universe ◽  
Friedmann Robertson Walker

We investigate the correspondence between the ghost and Chaplygin scalar field dark energy models in the framework of Einstein gravity. We consider a spatially nonflat Friedmann–Robertson–Walker universe containing dark energy that interacts with dark matter. We reconstruct the potential and the dynamics for the Chaplygin scalar field model according to the evolutionary behavior of ghost dark energy, which can describe the phantomic accelerated expansion of the universe.

Scalar Field Model of Dark Energy In the Double Complex Symmetric Gravitational Theory

2006 ◽  
Vol 23 (1) ◽  
pp. 7-9 ◽  
Author(s):  
Shao Ying ◽  
Gui Yuan-Xing ◽  
Wang Wei
Keyword(s):  
Dark Energy ◽  
Scalar Field ◽  
Field Model ◽  
Gravitational Theory ◽  
Double Complex ◽  
Scalar Field Model ◽  
Complex Symmetric

scholarly journals Combined cosmological tests of a bivalent tachyonic dark energy scalar field model

2014 ◽  
Vol 2014 (11) ◽  
pp. 026-026 ◽  
Author(s):  
Zoltán Keresztes ◽  
László Á. Gergely
Keyword(s):  
Dark Energy ◽  
Scalar Field ◽  
Field Model ◽  
Scalar Field Model ◽  
Cosmological Tests ◽  
Tachyonic Dark Energy ◽  
Energy Scalar

Bouncing scenario in Brans–Dicke theory

2020 ◽  
Vol 17 (04) ◽  
pp. 2050056
Author(s):  
Sunil Kumar Tripathy ◽  
Subingya Pandey ◽  
Alaka Priyadarsini Sendha ◽  
Dipanjali Behera
Keyword(s):  
Dark Energy ◽  
Scalar Field ◽  
Equation Of State ◽  
Linear Equation ◽  
Scale Factor ◽  
Cosmic Acceleration ◽  
Late Time ◽  
Dark Fluid

A bouncing scenario is studied in the framework of generalized Brans–Dicke theory. In order to have a dark energy (DE) driven late time cosmic acceleration, we have considered a unified dark fluid simulated by a linear equation of state (EoS). The evolutionary behavior of the DE equation of parameter derived from the unified dark fluid has been discussed. The effect of the bouncing scale factor on the Brans–Dicke parameter, self-interacting potential and the Brans–Dicke scalar field is investigated.

scholarly journals From scalar field theories to supersymmetric quantum mechanics

2017 ◽  
Vol 32 (12) ◽  
pp. 1750073 ◽  
Author(s):  
D. Bazeia ◽  
F. S. Bemfica
Keyword(s):  
Field Theory ◽  
Quantum Mechanics ◽  
Scalar Field ◽  
Field Model ◽  
Supersymmetric Quantum Mechanics ◽  
Field Theories ◽  
Quantum Mechanical ◽  
Scalar Field Theory ◽  
Scalar Field Model ◽  
The Subject

In this work, we report a new result that appears when one investigates the route that starts from a scalar field theory and ends on a supersymmetric quantum mechanics. The subject has been studied before in several distinct ways and here, we unveil an interesting novelty, showing that the same scalar field model may describe distinct quantum mechanical problems.

scholarly journals PHANTOM COSMOLOGY WITH A NONLINEAR BORN–INFELD TYPE SCALAR FIELD

2005 ◽  
Vol 14 (02) ◽  
pp. 355-362 ◽  
Author(s):  
H. Q. LU
Keyword(s):  
Dark Energy ◽  
Scalar Field ◽  
Equation Of State ◽  
Energy Condition ◽  
State Parameter ◽  
Strong Energy Condition ◽  
Strong Energy ◽  
Accelerating Expansion ◽  
Equation Of State Parameter ◽  
The Universe

Recent many physicists suggest that the dark energy in the universe might result from the Born–Infeld (B–I) type scalar field of string theory. The universe of B–I type scalar field with potential can undergo a phase of accelerating expansion. The corresponding equation of state parameter lies in the range of -1<ω<-⅓. The equation of state parameter of B–I type scalar field without potential lies in the range of 0≤ω≤1. We find that weak energy condition and strong energy condition are violated for phantom B–I type scalar field. The equation of state parameter lies in the range of ω<-1.

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