ar X iv : a st ro - p h / 04 12 61 9 v 4 3 1 M ay 2 00 5 Exactly Solvable SFT Inspired Phantom Model
نویسنده
چکیده
We construct an exact analytic solution to the Friedmann equations with a stringy inspired scalar matter and show explicitly an absence of the “Big Rip” singularity. The notable feature of this model is a wrong sign of the kinetic term and a special polynomial form of the effective tachyon potential. The method developed in the fivedimensional brane-world scenario is used. We show that the solution is stable with respect to small fluctuations of the initial conditions and present corresponding phase portraits. [email protected], Steklov Mathematical Institute, Russian Academy of Sciences [email protected], Steklov Mathematical Institute, Russian Academy of Sciences [email protected], Skobeltsyn Institute of Nuclear Physics, Moscow State University
منابع مشابه
ar X iv : h ep - t h / 04 05 01 3 v 1 3 M ay 2 00 4 Ladder operators for subtle hidden shape invariant potentials 1
Ladder operators can be constructed for all potentials that present the integrability condition known as shape invariance, satisfied by most of the exactly solvable potentials. Using the superalgebra of supersymmetric quantum mechanics we construct the ladder operators for two exactly solvable potentials that present a subtle hidden shape invariance. PACS No. 03.65.Fd, 11.30.Pb, 31.15.Pf
متن کاملar X iv : h ep - t h / 04 05 01 3 v 1 3 M ay 2 00 4 Ladder operators for subtle hidden shape invariant potentials
Ladder operators can be constructed for all potentials that present the integrability condition known as shape invariance, satisfied by most of the exactly solvable potentials. Using the superalgebra of supersymmetric quantum mechanics we construct the ladder operators for two exactly solvable potentials that present a subtle hidden shape invariance. PACS No. 03.65.Fd, 11.30.Pb, 31.15.Pf
متن کاملar X iv : a st ro - p h / 94 05 04 9 v 1 2 4 M ay 1 99 3 COMPLETE NORMALITY CONDITIONS FOR THE DYNAMICAL SYSTEMS ON RIEMANNIAN MANIFOLDS
New additional equations for the Newtonian dynamical systems on Riemannian manifolds are found. They supplement the previously found weak normality conditions up to the complete normality conditions for Newtonian dynamical systems.
متن کاملar X iv : a st ro - p h / 92 05 00 5 v 1 9 M ay 1 99 2 UCSBTH – 92 – 05 April 1992 CHAOTIC DARK MATTER
A very weakly coupled scalar field with mass m and initial vacuum expectation value V will provide enough mass to close the universe provided V ≃ (3 × 10 8 GeV)(100 GeV/m) 1/4. We discuss possible models in which such a field could arise. (a) Electronic address (internet): [email protected].
متن کامل