Quantum escape of sudden future singularity

摘要: We consider finite-time, future (sudden or Big Rip type) singularities which may occur even when strong energy condition is not violated but equation of state parameter time-dependent. Recently, example such singularity has been presented by Barrow, we found another it. Taking into account back reaction conformal quantum fields near singularity, it shown explicitly that effects delay (or make milder) the singularity. It argued if evolution to realistic, due universe end up in de Sitter phase before scale factor blows up. This picture generalized for braneworld where sudden on brane with qualitatively similar conclusions.