Abstract： The authors show that the bubbles S2 x S2 can be created from vacuum fluctuation in the background de Sitter universes of k = 0,1, so the space-time foam-like structure might really be constructed from bubbles of S2 x S2 in the very early inflating phase of our universe. Still, whether such foam-like structure persisted during the later evolution of the universe is a problem unsolved at present.
LIU Liao;HE Feng;. Bubbles Created from Vacuum Fluctuation[J]. 中国物理快报, 2001, 18(8): 1007-1008.
LIU Liao, HE Feng,. Bubbles Created from Vacuum Fluctuation. Chin. Phys. Lett., 2001, 18(8): 1007-1008.
2001, Vol. 18 
