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Space-Time Structures from IIB Matrix Model

1998; Oxford University Press; Volume: 99; Issue: 5 Linguagem: Inglês

10.1143/ptp.99.713

1347-4081

Hajime Aoki, Satoshi Iso, H. Kawai, Yoshihisa Kitazawa, Tsukasa Tada,

Cosmology and Gravitation Theories

We derive a long distance effective action for space-time coordinates from a IIB matrix model. It provides us an effective tool to study the structures of space-time. We prove the finiteness of the theory for finite N to all orders of the perturbation theory. Space-time is shown to be inseparable, and its dimensionality is dynamically determined. The IIB matrix model contains a mechanism to ensure a vanishing cosmological constant which does not rely on the manifest supersymmetry. We discuss possible mechanisms to obtain realistic dimensionality and gauge groups from the IIB matrix model.