Superstring theory and its successor, M-theory, do not propose inherent randomness in the same way as quantum mechanics does. While quantum mechanics introduces inherent probabilistic behavior at the fundamental level, superstring theory and M-theory aim to provide a more comprehensive framework that encompasses both quantum mechanics and gravity.
In superstring theory, the fundamental building blocks of the universe are not point-like particles but tiny, vibrating strings. These strings can vibrate in different modes, giving rise to particles with specific properties. The theory seeks to describe all fundamental particles and their interactions as different vibrational states of these strings.
M-theory is an extension of superstring theory that attempts to unify different versions of superstring theory. It postulates that there are higher-dimensional objects called "branes" that can exist alongside the strings. M-theory proposes that our four-dimensional universe is actually embedded within a higher-dimensional space, and the observed properties of particles and forces are a manifestation of the geometry and dynamics of this higher-dimensional space.
Neither superstring theory nor M-theory explicitly introduce randomness as a fundamental aspect of the universe. However, they do not yet provide a definitive resolution to questions of determinism or randomness. The behavior and properties of superstring theory and M-theory are governed by mathematical equations and principles, and the ultimate nature of determinism or randomness within the theory is still an area of active research and exploration.
It's important to note that our understanding of superstring theory and M-theory is still evolving, and there is ongoing research aimed at further developing and refining these theories.