v 2 1 M ar 2 00 5 Cosmology with a Nonlinear Born - Infeld Type Scalar Field
نویسنده
چکیده
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 < − 1 3. 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.
منابع مشابه
ar X iv : h ep - t h / 06 06 03 3 v 1 5 J un 2 00 6 Cosmology in Nonlinear Born - Infeld Scalar Field Theory With Negative Potentials
The cosmological evolution in Nonlinear Born-Infeld(hereafter NLBI) scalar field theory with negative potentials was investigated. The cosmological solutions in some important evolutive epoches were obtained. The different evolutional behaviors between NLBI and linear scalar field theory have been presented. A notable characteristic is that NLBI scalar field behaves as ordinary matter nearly th...
متن کاملar X iv : h ep - t h / 06 06 03 3 v 2 1 0 Ju l 2 00 6 Cosmology in Nonlinear Born - Infeld Scalar Field Theory With Negative Potentials
The cosmological evolution in Nonlinear Born-Infeld(hereafter NLBI) scalar field theory with negative potentials was investigated. The cosmological solutions in some important evolutive epoches were obtained. The different evolutional behaviors between NLBI and linear scalar field theory have been presented. A notable characteristic is that NLBI scalar field behaves as ordinary matter nearly th...
متن کاملar X iv : h ep - t h / 06 06 03 3 v 3 5 S ep 2 00 6 Cosmology in Nonlinear Born - Infeld Scalar Field Theory With Negative Potentials
The cosmological evolution in Nonlinear Born-Infeld(hereafter NLBI) scalar field theory with negative potentials was investigated. The cosmological solutions in some important evolutive epoches were obtained. The different evolutional behaviors between NLBI and linear scalar field theory have been presented. A notable characteristic is that NLBI scalar field behaves as ordinary matter nearly th...
متن کاملar X iv : h ep - t h / 06 06 03 3 v 4 3 0 A pr 2 00 7 Cosmology in Nonlinear Born - Infeld Scalar Field Theory With Negative Potentials
The cosmological evolution in Nonlinear Born-Infeld(hereafter NLBI) scalar field theory with negative potentials was investigated. The cosmological solutions in some important evolutive epoches were obtained. The different evolutional behaviors between NLBI and linear(canonical) scalar field theory have been presented. A notable characteristic is that NLBI scalar field behaves as ordinary matte...
متن کاملM ar 2 00 5 Phantom Cosmology with the Born - Infeld Type Scalar Field
We considered the phantom cosmology with the lagrangian L = 1 η [1 − 1 + ηg µν φ , µ φ , ν ] − u(φ), which is original from the nonlinear Born-Infeld type scalar field with the lagrangian L = 1 η [1 − 1 − ηg µν φ , µ φ , ν ] − u(φ). This cosmological model can explain the accelerated expansion of the universe with the equation of state parameter ω < −1. We find that the potential u(φ) should be...
متن کامل