Cosmological dynamics with nonlinear interactions
نویسندگان
چکیده
منابع مشابه
Soliton Dynamics in a 2d Lattice Model with Nonlinear Interactions
This paper is concerned with a lattice model which is suited to square-rectangle transformations characterized by two strain components. The microscopic model involves nonlinear and competing interactions, which play a key role in the stability of soliton solutions and emerge from interactions as a function of particle pairs and noncentral type or bending forces. Special attention is devoted to...
متن کاملNonlinear Fractional Dynamics on a Lattice with Long Range Interactions
A unified approach has been developed to study nonlinear dynamics of a 1D lattice of particles with long-range power-law interaction. A classical case is treated in the framework of the generalization of the well-known Frenkel-Kontorova chain model for the non-nearest interactions. Quantum dynamics is considered following Davydov’s approach for molecular excitons. In the continuum limit the pro...
متن کاملNonlinear Dynamics of Bose-Einstein Condensates with Long-Range Interactions
The motto of this paper is: Let's face Bose-Einstein condensation through nonUnear dynamics. We do this by choosing variational forms of the condensate wave functions (of given symmetry classes), which convert the Bose-Einstein condensates via the time-dependent GrossPitaevskii equation into Hamiltonian systems that can be studied using the methods of nonUnear dynamics. We consider in particula...
متن کاملCosmological solutions with nonlinear bulk viscosity
A recently proposed nonlinear transport equation is used to model bulk viscous cosmologies that may be far from equilibrium, as happens during viscous fluid inflation or during reheating. The asymptotic stability of the de Sitter and Friedmann solutions is investigated. The former is stable for bulk viscosity index q < 1 and the latter for q > 1. New solutions are obtained in the weakly nonline...
متن کاملNonlinear Cosmological Structure Formation
I present a general discussion of the evolution and model-dependence of both the linear and nonlinear power spectrum of density fluctuations. The features of the linear power spectrum in cosmological models with cold dark matter (CDM) and cold+hot dark matter (C+HDM) are reviewed, and useful analytical approximations are summarized. Cosmological numerical simulation results are then used to ill...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Classical and Quantum Gravity
سال: 2012
ISSN: 0264-9381,1361-6382
DOI: 10.1088/0264-9381/29/23/235001