D/antiD Dark Energy in String Warped Compactification
  We study the evolution of relic D3-branes after the D3/\bd-brane inflation in string warped compactification. The motion of D3-branes can be frozen under certain condition during the radiation/matter domination. These D3-branes can not be released until the D3/\bd-branes potential energy becomes dominated at late time. Subsequently they will move towards to \bd-branes, which play the role of uplifting AdS minimum to dS minimum, near the apex of throats. The annihilation of D3/\bd-branes leads to the disappearance of dS vacua. This process may be regarded as a rapid decay channel of present dS vacua. We discuss the parameter spaces required by this process and calculate the decay time. 
Yun-Song Piao