  The strongest version of the gauge/gravity duality conjecture relates the 1/N
correction in super Yang-Mills theory and the quantum correction in superstring
theory. We perform a quantitative test of this conjecture at finite
temperature, by studying the D0-brane matrix quantum mechanics and the black
zero-brane in type IIA superstring theory. We find good agreement, which
strongly suggests that the super Yang-Mills theory does provide us with a
nonperturbative formulation of quantum gravity through the gauge/gravity
duality.
