One big question: What laws of quantum mechanics could have made the Big Bang a Big Bounce instead?

We recently reported on a theory that says our universe might not have gotten its start when it collapsed in on itself and exploded. The theory says that such an event may have been prevented by the laws of quantum mechanics, meaning that the beginning of our current universe would have been more of a Big Bounce than a Big Bang.

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CrazyNeutrino said:

One big question: What laws of quantum mechanics could have made the Big Bang a Big Bounce instead?

We recently reported on a theory that says our universe might not have gotten its start when it collapsed in on itself and exploded. The theory says that such an event may have been prevented by the laws of quantum mechanics, meaning that the beginning of our current universe would have been more of a Big Bounce than a Big Bang.

more…

Big Bang vs Big Bounce is one of those questions where physicists keep changing the answer. Is a Big Bang possible – everyone agrees that the answer is “yes”. Is a Big Bounce possible – the answer keeps flip-flopping between “yes and “no”.

I’ve only seen the answer flip between yes and no twice since 1998, and not at all in the past ten years, so had begun to hope that everyone had become seriously sick of the question.

This looks very like the fifth-most-recent flip-flop answer.

The fifth most recent was a “yes” based on quantum tunnelling. circa 1970s

The fourth most recent was a “no” based on wormhole collapse. circa ?

The third most recent was a “yes” based on wormhole stabilisation using exotic matter with negative density. circa 1988

The second most recent was a “no” based on the new discovery of dark energy. circa 1998

The most recent was a “yes” based on a re-evaluation of dark energy. circa 2003

Keep in mind that “possible” is not at all synonymous with “happened”. Travel faster the speed of light is “possible” through quantum tunnelling, but it doesn’t follow that cows travel faster than light.