Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China
; Chinese Acad Sci, Interdisciplinary Ctr Theoret Studies, Beijing 100080, Peoples R China
We study the evolution of relic D3-branes after the D3/(D3) over bar -brane inflation in string warped compactification. The motion of D3-branes can be frozen under certain conditions during the radiation/matter domination. These D3-branes cannot be released until the D3/(D3) over bar -branes potential energy becomes dominated at late time. Subsequently, they will move towards to (D3) over bar -branes, which play the role of uplifting AdS minimum to dS minimum, near the apex of throats. The annihilation of D3/(D3) over bar -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.