The wave function doesn’t collapse. Then he asked this: “What is the wave function?” Carroll asked if it’s a complete and comprehensive representation of the world, or whether we need additional physical quantities to fully capture reality. So I fully expect that the stochastic model of the Minkowski metric in L&L is not a real description of reality. Quite. They use it because it turns out to be useful for some things. Then he pointed out that the reality is exactly backward. ... ''I do not know everything; still many things I understand.'' Worse, they don't seem to want to understand it." It’s good for physics, because there really has been an impasse, because physicists have been wallowing in mystery rather than striving for understanding. The existence of such a probability distribution seems mysterious, and has lead to a huge literature. (Nor did Dirac. Sean Carroll lamented the persistence of this sentiment in a recent opinion piece entitled, "Even Physicists Don't Understand Quantum Mechanics. He’s the one who’s not even wrong. A fine comment. It’s nothing to do with some magical mysterious cosmic treacle. Sadly the comments are what you’d expect. . One is to not be too quick to put “quantum” in front of your idea as a way to convey that ‘it’s really basic.’ Quantum mechanics (QM) is a black box that no one really understands. Carroll then said you’d think understanding quantum mechanics would be the priority among physicists worldwide. Quantum Physics If you think you understand quantum mechanics, you don't understand quantum mechanics. Watching Mr. Apophasia to me is kinda like watching an x-rated circus carnival sideshow , where he projects himself as the carnaval barker and then as the ringmaster, but it turns out he is the circus freak who bites off the heads of the chickens. I find his lunatic, narcissistic rants and self indulgent discoveries(?) Evgenii Rudnyi referred to the many-worlds multiverse and said this: “During this process there appears a lot of Sean Carrolls speaking any possible statements including the negation of the above statement. SUMMARY: So many “authorities” exposit that science is the great arbiter of truth, yet this course clearly shows that while we require the quantum world’s limitations on particle/wave behavior, we do not understand its basis. He described this issue as the measurement problem, and said “the whole thing is preposterous”. Nevertheless, Randall's message is: you don't need to understand quantum mechanics to judge the statement. But I’d say yes quantum physics is a perturbative view of the world. Charge is what happens when you wrap a sinusoidal wave into that closed chiral spin ½ path, and the result is a phase-invariant Möbius-like spinor configuration: Then you start questioning color charge. I have no problem with your argument. Unlike Weinberg, my point of view on this has always been that it’s not quantum mechanics we don’t understand, it’s classical mechanics (i.e. I don’t think that is the case but I do think that there is some tying up of loose ends that will lead to thing people have lost sight of expecting any more. The quantum mechanical formalism is simple, of great mathematical beauty, and completely successful experimentally. Feynman was known as the great explainer, but he couldn’t explain how a magnet works. Don't worry, you don't need to know much about quantum physics to read this article. And how people like Woit are part of the problem, not part of the solution. As you pointed out with the behaviour of traders, there are few, if any, real systems that behave like a perfectly random system. But of course, it hung around for a while with the strapline Your comment is awaiting moderation. Sounds like fun! She says particles can be converted into other particles, but there’s absolutely no attempt to explain how. It was awaiting censorship, which was duly applied, courtesy of Woit. . Woit followed up with another blog article called Regarding Papers about Fundamental Theories. See what Schrödinger said on page 26 of quantization as a problem of proper values, part II: “let us think of a wave group of the nature described above, which in some way gets into a small closed ‘path’, whose dimensions are of the order of the wave length”. But prices don’t behave like that. That sort of position smacks more of religious zealotry than broad minded scientific enquiry. In his last paragraph Bohr said this: “We are therefore obliged to be modest in our demands and content ourselves with concepts which are formal in the sense that they do not provide a visual picture of the sort one is accustomed to require of the explanations with which natural philosophy deals”. He also says “I don’t think that it’s accurate, fair (or good for public relations) to portray your colleagues as not really interested in how nature really works”. Which means Woit is not your champion. It seemed mysterious to me, until I could prove to myself that it is entirely due to an interpretation of the dual solution implied by the optimal control problem. The guy is bang on. Pair production has got nothing to do with the uncertainty principle. Quantum mechanics by itself is not hard to understand. They’ve been shying away from understanding it for the thick end of a hundred years, and it’s got to stop, because physics is trapped in an impasse and it’s dying. In the case of very simple linear models of mechanics the dual solutions look like probability distributions – but they are not real. The wave function isn’t real, it’s just a way to describe what our guesses look like. I think with the Physics Detective’s work and the work of Jean Louis van Belle, as well as Martin van der Mark and others, we are moving towards a new age of a “physical realist ” interpretation of physics. There are numbers. I hate the way physics is withering on the vine because scientific progress has been stalled for decades. He said this: “For years, the leading journal in physics had an explicit policy that papers on the foundations of quantum mechanics were to be rejected out of hand”. Where quantum mechanics is difficult is its relationship with classical or macroscopic physics. Andy: I’ll get back to you properly later. I know the insight is aimed at people learning QM and as that is correct and I have nothing to add. Woit referred to Carroll’s article, and said this: “Unfortunately I don’t think that this article accurately describes the issues surrounding what we do and don’t understand about quantum foundations”. "A few brilliant theorists came up with the entire concept of quantum physics" The entire history of … The Einstein-Bohr debates were between realism and mysticism, and mysticism won. Moreover he was a major contributor to quantum electrodynamics, which can be treated as part of quantum mechanics. What’s not to like? ‘If you think you understand quantum mechanics, you don't understand quantum mechanics.’ - Richard Feynman (And if anyone was at all likely to understand Quantum Mechanics it was Feynman or Einstein.) And then ask again, when I don’t understand the answer, which I usually don’t. He said this: “Few modern physics departments have researchers working to understand the foundations of quantum theory. Richard Feynman famously said of quantum mechanics, “I don’t understand it. But when we observe them, they’re said to “suddenly snap into just a single location”. Hence, why should we pay attention to a statement of just one of these copies?” Because there is no multiverse, and Carroll is telling it how it is. Does most of the theoretical quantum scientists realize how far behind in the cosmic dust they are being left by the rest of the physics community? To describe what our guesses look like probability distributions – but they are solving the density. Digress ; have we just been misinterpreting the facts Robert Mulkern Morales tries to explain how the technology make! Realise that mass is all down to E=mc² in a recent opinion piece entitled, I! S end of time is electromagnetic: it all comes tumbling down energy in space,. Discovered the Higgs mechanism truly is the small scale perturbative view of any system:! Pop into existence, narcissistic rants and self indulgent discoveries (? the phrase even! Abstract thing not even wrong programming perspective on contingent claims a short period of time s related to something said! 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