4 Exactly Solvable SFT Inspired Phantom Model
نویسنده
چکیده
We construct an exact analytic solution to the Friedman 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
Exactly Solvable SFT Inspired Phantom Model
An exact solution to the Friedmann equations with a string inspired phantom scalar matter field is constructed and the absence of the “Big Rip” singularity is shown explicitly. The notable features of the concerned model are a ghost sign of the kinetic term and a special polynomial form of the effective tachyon potential. The constructed solution is stable with respect to small fluctuations of ...
متن کاملar 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
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 solu...
متن کاملSolvable SFT Inspired Phantom Model
We construct an exact analytic solution to the Friedman 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 solut...
متن کاملA Classical Treatment of Island Cosmology
Computing the perturbation spectrum in the recently proposed Island Cosmology remains an open problem. In this paper we present a classical computation of the perturbations generated in this scenario by assuming that the NEC-violating field behaves as a classical phantom field. Using an exactly-solvable potential, we show that the model generates a scale-invariant spectrum of scalar perturbatio...
متن کاملConstrained fluctuation theories of rubber elasticity: General results and an exactly solvable model
We present a new model of rubber elasticity where linear forces act to constrain the fluctuations of the eigenmodes of the phantom model. The model allows us to treat the constrained junction and the tube model within the same, transparent formalism, does not require any further approximations, and is particularly suited for the analysis of simulation data for (strained) model polymer networks....
متن کامل