Ex nihilo
A widely supported hypothesis in modern physics is the zero-energy universe which states that the total amount of energy in the universe is exactly zero. That is the only kind of universe that could come from nothing. Such a universe would have to be flat in shape, a state which does not contradict current observations that the Universe is flat with a 0.5% margin of error.
In theology, the common phrase creatio ex nihilo (“creation out of nothing”), contrasts with creatio ex materia (creation out of some pre-existent, eternal matter) and with creatio ex deo (creation out of the being of God).