I was reading an article about various hypotheses related to the creation of
the Universe. All are scientific hypotheses, not invoking the God. One of
the hypothesis was about quantum fluctuation. It said that
the "nothingness" is inherently unstable and virtual particles (together
with their anti-particles) are constantly appearing and disappearing in the
nothingness due to quantum fluctuation. It said that higher the mass of
these particles and longer the duration of their existence, less frequently
they occur. Then the hypothesis postulated that the Universe came into
existence due to one such fluctuation which created a (super-, hyper-,
ultra-) massive particle (together with its anti-particle), which became
the Universe. Because the Universe is a long lived or possibly infinitely
long lived fluctuation, it must be very rare. The author did not say how
frequently (or infrequently) such a fluctuation can happen. Is it a real
possibility in the scientific sense and if so how infrequent such a
fluctuation could be ? In other words how often an Universe like ours can
come into existence due to quantum fluctuation in the "nothingness" ? I
understand that our sense of time may be invalid in this respect as time
came into existence only at the time of the creation of the Universe (big
bang). But is there any way of calculating how frequently an Universe like
ours together with its anti-Universe can come into being from nothingness ?
Is this question so hypothetical that it has no real meaning at all ?

--
gautam