MG11 
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QUANTUM GRAVITY IN CYCLIC (EKPYROTIC) AND MULTIPLE (ANTHROPIC ) UNIVERSES WITH STRINGS AND LOOPS

The ultimate goal of quantum gravity is to seek the origin and fate of our universe. To this end, the string theory and loop theory (loop quantum gravity) may be needed. Both theories have been highly developed, but are far from giving us clues toward the origin and fate of our universe. We are seeking, in this paper, a model constructing the momentum-energy tensor which combines general relativity and particle physics. Will this model lead to a spacetime infinity theory: infinity in time (t = } ‡) and infinity in space (x, y, z = } ‡) ? Can this theory be verified by observational evidences? If this model is correct, our universe is merely a small part of gigantic panorama of infinity in spacetime embracing the existing theories such as cyclic (ekpyrotic) and multiple (anthropic) universes.