Moment of the Big Bang
There is the theory that the universes were created out of nothingness, which is a pure vacuum. It has been found that vacuums contain virtual particles that come into existence, only to disappear momentarily later. This process of quantum fluctuation is believed to occur both inside and outside our universe.
Occasionally, something happens to prevent this process from disappearing. At this point, the fluctuation would react with the latent energy in the vacuum, creating enough energy to cause the Big Bang. In quantum cosmology, no energy is stolen from the primordial vacuum. It is just in a different form. All matter consists of positive energy, which is balanced by the negative energy of gravity. Thus, the total energy in the universe could be zero.
This theory suggests that new universes could be created at any time from inside or outside our universe. It is implied that our universe is not necessarily the only one.
