Phantom cosmology without Big Rip singularity

作者：Astashenok Artyom V; Nojiri Shin' ichi^*; Odintsov Sergei D; Yurov Artyom V

来源：Physics Letters B, 2012, 709(4-5): 396-403.

DOI：10.1016/j.physletb.2012.02.039

We construct phantom energy models with the equation of state parameter w which is less than -1, w %26lt; -1, but finite-time future singularity does not occur. Such models can be divided into two classes: (i) energy density increases with time (%26quot;phantom energy%26quot; without %26quot;Big Rip%26quot; singularity) and (ii) energy density tends to constant value with time (%26quot;cosmological constant%26quot; with asymptotically de Sitter evolution). The disintegration of bound structure is confirmed in Little Rip cosmology. Surprisingly, we find that such disintegration (on example of Sun-Earth system) may occur even in asymptotically de Sitter phantom universe consistent with observational data. We also demonstrate that non-singular phantom models admit wormhole solutions as well as possibility of Big Trip via wormholes.

• 出版日期2012-3-23