Exponential value of Eigen gap = |Eval1 - EVal2|, or e^|Eval1 - EVal2| determines how fast or slow it would take vectors to become parallel to the principal Eigen vector while doing matrix multiplication of matrix with itself (While already calculating matrix multiplication between matrix and random vector) . Exponential value being more it takes less matrix multiplication and if being small, it would take much longer but eventually it becomes parallel to the principal eigen vector.
Shubhendra
