Hi! A question from a beginner in quantum physics... If the quantum field randomly produces an electron-positron pair, and the pair annhialate, a gamma ray photon is produced. The net result of this process is gamma ray photons coming out of the quantum field at random. This means the quantum field is constantly producing energy out, with no energy inputs. I have never read that the quantum field randomly absorbs photons to provide energy for pair creation. This seems to me to be in violation of conservation of energy. Does the quantum field constantly pour energy into the universe, or is there a balancing side to this equation?