×

SO(1,1) dark energy model and the universe transition. (English) Zbl 1067.83571

Summary: We suggest the SO(1, 1) scalar field model of dark energy. In this model, the Lagrangian may be decomposed as that of the real quintessence model and the negative coupling energy term of \(\Phi\) to \(a\). The existence of the coupling term \(L^c\) leads to a wider range of \(w_{\Phi}\) and overcomes the problem of negative kinetic energy in the phantom universe model. We propose a power-law expansion kinetics model of the universe with time-dependent power, which can describe the universe transition from ordinary acceleration to super acceleration. We also give a simple discussion of the Big Rip singularity, and point out the possibility that the universe driven by a phantom avoids it.

MSC:

83F05 Relativistic cosmology
85A40 Astrophysical cosmology
PDFBibTeX XMLCite
Full Text: DOI arXiv