In our universe, this leads to the spontaneous creation and annihilation of what are called virtual particles . One consequence of virtual particles is the evaporation of black holes. Potential energy is negative, while rest-mass and kinetic energies are positive. The History of the Universe 0 seconds . The Big Bang.
Space begins expanding.
10 -43 seconds. The Planck time . We do not know what happened before this time, because our knowledge of physics breaks down at this point. At the Planck time, symmetry breaks. Gravity becomes a distinct force.