  We study the intensity interferometry with lepton pairs for nuclear
collisions at RHIC and LHC energies. It is argued that the invariant mass
dependence of HBT radii extracted from the correlation functions of dilepton
pairs can be used as an efficient tool to scale the size and life time of the
quark gluon plasma expected to be formed in nuclear collisions at RHIC and LHC.
Quantitatively different magnitudes of HBT radii are obtained at RHIC and LHC
indicating stronger radial flow at LHC.
