Direct confirmation of the gauge/gravity correspondence and its application to the studies of the space-time structure

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We have performed numerical simulations of one-dimensional supersymmetric gauge theory and confirmed the gauge/gravity correspondence conjectured from superstring theory. This also enabled us to get new insights into the interior structure of black holes. On the other hand, we have studied a matrix model, which was proposed as a nonperturbative formulation of superstring theory, in the case of Lorentzian metric, and obtained results which show that only three directions of a microscop ic nine-dimensional space start to expand at some point in time. This is an important observation, which is reminiscent of the birth of our Universe.