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He maintains that physics needs to embrace a cosmology that respects the apparent irreversibility of time, the so-called arrow of time.
Smolin argues that time is real, because he experiences it, as a sequence of moments. I thought Lee was a relativist, albeit with an enhanced physical role for time and the possible inclusion of nonlocal hidden variables the class of theories in fact, to which string theory belongs.
Some will simply not agree — any string theorists, for example, would dismiss his loop quantum gravity viewpoint. There is, however, the problem that we can’t see any direct evidence of these other worlds, and no one is able to suggest experiments that could determine whether or not they exist.
There is plenty on how we observe time, and how interaction with matter can change these observations, but nothing smopin. May 7, at 3: Annoyingly poorly argued book about moving beyond current ideas of time in physics, with some interesting ideas. Cosmological Fallacy Having embraced Leibniz’s stance, Smolin introduces the idea of a cosmological fallacy, which he defines as: Or is this a case where mathematics cannot fully capture the physics?
Whether or not Smolin wins his argument with his fellow physicists, the case he makes for saying that when we deny the reality of time, we are confusing a mathematical model with what it is modelling seems to me convincing. I highly recommend it. But in doing so he misstates the anthropic argument unless I’m misunderstanding what he’s trying to do there.
Indeed I hime as a symmetry the notion of reality itself being indistinguishable from nonreality: But, he explains, you just don’t seem to be able to progress any further once you accept Einstein’s “block-universe” view.
Or, how can a universe that preceded our own be detected? It may mean General Relativity isn’t easily compatible idea of laws that evolve in time. In this book, Doctor Smolin challenges the perceived illusion of time and proposes, at a high level, a system of cosmology that is based on something we perceive every moment of our lives, time.
Time Reborn by Lee Smolin – review
What else is real besides time? Evolution in time is secondary, a by-product of the theory. But if time rebirn just a means to measure change, solin in principle, it should permit the possibility of a world where change is cyclical.
Any advance on relativity will need a new physical concept, not just a refactoring job. And, in our understanding of quantum physics, this isn’t just a matter of us missing some information More generally, I don’t see how lawlessness can be experimentally distinguished from unknown laws, especially if the lawlessness disappears as we test it.
He thinks this is necessary: The fact is, the majority of books that claim to be about time tell you nothing. My instinctive reaction is that it will probably be shown to be wrong.
Now I do have one issue with Smolin here. Back in the ‘s, he published a work that focused on the idea that the universe or rather a series of reproducing universes evolved over time. In other words, we basically assume that the physics we observe here on Earth and in our nearby region of space applies tome well to distant regions in space. And maybe this implies that there is no fact of the matter at all as to llee reality is; nature itself cannot distinguish itself from what it might have equivalently been.
Time Reborn – Lee Smolin
If laws are just one more part of the evolving configuration, and the real law is the meta-law, then don’t we arrive right back at a block universe? That dream must smoolin seen now as a metaphysical fantasy that may have inspired generations of theorists but is now blocking deborn path to further progress. No one has ever seen or detected absolute space.
Smolin was already famous for proposing “cosmological natural selection”, and he discusses this at enough length in this book that I have no desire to read the one dedicated to that.
Time Reborn – Wikipedia
How do you start with absolutely no assumptions – not even that there is a reality – and by some sequence of developments that begin completely randomly, following no rules whatsoever such as a rule that says there is or isn’t a reality or that things do or do not exist – so why can’t they spontaneously “begin” to? Smolin does not rely on a divinity for his argument, but he is willing to accept as a fundamental principle that everything that happens has a reason for that thing happening as opposed to something else, and given knowledge of all of the factors going into the result, there would be no other possible outcome.
I also contributed a review which is here: The basic idea of Smolin’s proposal for an evolving universe is that a universe can create other universes through the creation of black holes, meaning that it’s highly probable that the universe we’re in is one that is optimized for the creation of black holes.
If such gravity waves were detected in the CMB radiation, might there be a credible alternate explanation? The Controversy Before I can even begin a review of the book, I do feel that a bit of background must be provided on the scientific context in which this book appears. But there are a lot of sane people who are not aware that certain physical evidence GPS system shows that the time dilating effect is not reciprocal during relative motion.
Smolin is confident that that can be overcome; unfortunately he has not yet found proof.