"Not only does physics tell us how something could have come from nothing, it goes further, by Krauss's account, and shows us that nothingness is unstable: something was almost bound to spring into existence from it. If I understand Krauss aright, it happens all the time:... Particles and antiparticles wink in and out of existence..." --Richard Dawkins
A couple of years ago, Krauss discussed the current status of the universe, and how it could have come from nothing. The lecture's video quickly became a YouTube sensation, of nearly a million viewers, and out of that success emerged the idea for his new book, "A Universe from Nothing: Why there is Something rather than Nothing," in which Lawrence Krauss recounts the recent developments in our conceptions of cosmology, with the help of modern physics, addressing the question of "Why there is something rather than nothing," and why this is in fact a scientific question rather than a philosophical or theological one.
"Science has changed the way we think about ourselves and our place in the cosmos, and the astounding progress of the last forty years has led us to the threshold of addressing key foundational questions about our existence and our future that were previously thought to be beyond our reach," says Krauss, ". . . , the public deserves to share in the excitement of our scientific quest to understand the biggest mysteries of our existence. As Steven Weinberg has stressed, science doesn't make it impossible to believe in God. It however makes it possible to consider a universe without one."
In an entirely statistical world of quantum physics, whatever change in quantum numbers, only permitted by the selection rules (that limit the transition probability from one eigenstate to another), define how the probability of transitioning from one level to another can happen. Experiments reveal that virtual particles are popping in and out of existence, allover the pseudo-conscious universe. Einstein's relativity provides that empty space can curve, and quantum physics permits matter to appear out of nowhere, given it also vanishes in no time. The reader has just to understand something about vacuum in space, as it is viewed in quantum field theory.
Since modern physics assumes that a vacuum is full of fluctuating electromagnetic waves, which can never be completely eliminated, they have been occurring before the dawn of time. All were thought to have quickly disappeared, but perhaps under the right conditions, if one lived long enough to give rise to the original event of the nascent universe: banging inflation. Thereafter, the original relatively infinitesimal volume expanded enormously to produce our present universe. Krauss recounts its history, underling the recent discoveries that not only increased our knowledge but also our ignorance (imperfect knowledge).
Krauss, a pioneering theoretical physicist, at the forefront of exploratory cosmology and particle physics, tackles the timeless enigma, articulating how cosmic physics has literally changed the response to this ancient question. Recent research into the origins of the universe explored by quantum mechanics, shows that our universe could arise from nothing. I enjoyed above all Richard Dawkins 'Afterword', that nothing expands the mind like the expanding universe, made known to the lay by Sir James Jeans before Dr. Krauss was even born. He concludes that, "Krauss's vision of the cosmology of the remote future is paradoxical and frightening!"