The theory of quantum mechanics, as it currently stands, does not provide a comprehensive explanation for the origin of the universe from nothing. Quantum mechanics is a highly successful framework that describes the behavior of particles and their interactions at the microscopic scale, but it primarily deals with the behavior of matter and energy within an already existing universe.
The question of how the universe came to exist out of nothing is a topic that falls under the realm of cosmology and the study of the origin of the universe. There are various theories and models proposed by physicists and cosmologists to explain the origin of the universe, such as the Big Bang theory, inflationary cosmology, and string theory, among others.
However, these theories do not address the question of how something can arise from nothing in the philosophical sense. The concept of "nothing" in physics is often more nuanced and may involve underlying quantum fields or fluctuations. Moreover, the question of why the universe exists at all, or why there is something rather than nothing, goes beyond the scope of scientific inquiry and enters the realm of metaphysics and philosophical speculation.
It is important to note that our understanding of the origin of the universe is still a subject of active research and debate. While scientific theories provide frameworks to explain and understand the workings of the universe, the ultimate question of its origin remains a topic of philosophical and speculative discussion.