He tried to undermine Carroll’s claim that the leading journal rejected papers on the foundations of quantum mechanics. I’ve just noticed that your second comment was addressed to Alan! He says Dirac’s “close friend Patrick Blackett, one of the leading players in the story’s denouement, denied it”). But I don’t seem to have heard much about this sort of thing recently. However it bears no resemblance to the real world. Richard Feynman famously declared, "I think that I can safely say that nobody really understands quantum mechanics." The vast majority of people do not have a sufficient understanding of quantum mechanics to judge whether Cueball's statement is correct. As a little demonstration of what I mean, I left a comment on Woit’s blog. The quote, exact words, "If you think you understand quantum mechanics, you don't understand quantum mechanics." I also accidentally came accross a Wikipedia list of famous academic frauds and it added much insight as to the money grubbing that permeates modern science. Something similar appears in options pricing in finance. Carroll isn’t, and quite right so. Oh no it doesn’t. Carroll said until physicists answer these questions, they don’t understand quantum mechanics. Not one of them defends Carroll. Another great read John. email. Take a look at Peter Woit’s blog. ‘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.) 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. They all support Woit’s criticism of Carroll. 1. Andy: 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. Then you think some more about electron capture, and then you realise the nuclear force is electromagnetic: It all comes tumbling down. A U(1) gauge symmetry is no substitute for that. Then you’ll understand the photon in the mirror-box, and then you’ll realise that mass is all down to E=mc². "Quantum physics … Oh phooey. . ‘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.) All the fairy tales, all the lies to children. The wave function isn’t real, it’s just a way to describe what our guesses look like. It wasn’t awaiting moderation. Perhaps it’s related to something Carroll said towards the end of his article. Until next time. I’ve never heard of him. That’s just lies-to-children. It’s just useful for some things. That’s not physics, that’s cargo-cult science. Because once you start putting some real foundations in, you come to appreciate that the quantum foundations have always been missing. Courtesy of some magical mysterious creation and annihilation operators? . What could be simpler? Quantum mechanics is arguably the greatest achievement of … But hey, I’ve just watched https://www.youtube.com/watch?v=whoylwf-i0A . He said this: “Few modern physics departments have researchers working to understand the foundations of quantum theory. The guy is bang on. Carroll has said it loud and clear in an international newspaper. Hi John, I just thought I would share a link to an answer on quora to a question about why space time time is so hard to quantize. 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. Mind you, I thought this was excellent: Something is Rotten in the State of QED by Oliver Consa. 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. The answer goes further to explain that as a result of the assumptions that it ends up as a core assumption to make the maths work that light does not interact with light. If they’re not being observed, the objects are said to exist in a superposition of different possibilities, such as being at any one of various locations. If a quantum fluctuation can borrow energy for a short period of time there is (phase) space to create an arbitrary number of additional short lived particles”. It's a world whose foundation is mortared by math that comes in two brands: abstract and mindbogglingly abstract.The brilliant Albert Einstein didn't believe in this realm, and yet he won a Nobel Prize for playing in it.This is the world of quantum mechanics, and it is %^$&#*@ weird. Nevertheless, Randall's message is: you don't need to understand quantum mechanics to judge the statement. He’s the one who’s not even wrong. 80 years after Schrodinger, Heisenberg, Einstein, et al provided their important limitations on reality, we really have made no further mathematical progress in … People say light doesn’t interact with light because of the mathematics of QED, even when there’s hard scientific evidence that light does interact with light. It’s all of them. Sci Rep 9, 19984 (2019)] shows that the wave equation can be derived from a the least action principle when uncertainty is injected into the space-time metric of general relativity. The guy absolutely nailed it. She says particles can be converted into other particles, but there’s absolutely no attempt to explain how. Please don’t tell me we’re still saying some strings are superior to others. Where quantum mechanics is difficult is its relationship with classical or macroscopic physics. This martingale is very useful for calculating the expected values of local perturbations of initial conditions. I just said this: “I think the problem is more widespread than you think. However it is difficult to interpret, and philosophical contradictions and counter-intuitive results are apparent at a fundamental level. I have commented on this topic here https://physicsdetective.com/the-theory-of-everything/#comment-2383. I also think that if you don’t know where something is, it could be anywhere. Quantum mechanics is arguably the greatest achievement of … Quantum mechanics says our world is nebulous, fuzzy, a haze of possibilities until it somehow snaps to attention upon an appropriate interaction, observation or measurement. That’s a good start. We will talk about this some other time, so keep the density matrix in mind. When you plump for the latter you’ll soon realise that a wave in a closed path exhibits resistance to change in its motion, just like a wave in an open path. What we don’t do is claim to understand quantum mechanics. Mystery solved! See the 2011 physicsworld article top 10 breakthroughs of 2011, along with the secret lives of photons revealed and catching sight of the elusive wavefunction: Also see the ScienceMag article Furtive approach rolls back the limits of quantum uncertainty and the underlying Science paper Observing the Average Trajectories of Single Photons in a Two-Slit Interferometer. That was the ominous portent of things to come. I am reliably informed that I am not alone in this. I think wavefunction is real too, and that weak measurement experiments by Lundeen et al prove it. And then ask again, when I don’t understand the answer, which I usually don’t. “I don’t feel that I don’t understand quantum mechanics,” he says. Then he pointed out that the reality is exactly backward. Or how irrelevant to modern life they’ve become. Do the gamma photons pop out of existence, and the electron and positron pop into existence? 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”. Get the picture? I’ll check him out Greg. Spot on. It is a theory of linear vector spaces and operators. Whilst it’s still fresh in your mind, read the nature of time. . In the simplest versions of this model, the optimal dual is a martingale measure. Quantum mechanics impacts on many areas of physics from pure theory to applications. Well, it's impossible to sufficiently define in one, two, or even three sentences. GoletaBeach said “Sean Carroll’s op-ed left me unimpressed”. That isn’t a “basic fact” at all. He’s part of the problem, not part of the solution. Anyway, I digress; have we just been misinterpreting the facts? To reply properly, I think Karen Markov’s quora answer was pseudoscience junk. I didn’t link to the physics detective. 80 years after Schrodinger, Heisenberg, Einstein, et al provided their important limitations on reality, we really have made no further mathematical progress in … Her equations are full of infinities because she’s using a point-particle electron. Or do waves change from an open linear path to a closed chiral spin ½ path? I was impressed with it. It’s about the wave function and he gives a very nice explanation of how tracks are formed in the cloud chamber. position, momentum, spin, any property) once observed. I think it’s good stuff, and I guess others do too, because I can see 558 citations on Google scholar. But in truth he defends pseudoscience from physics. Ah. 91, 543–562 (2002)]. Yew! Yes, I’d agree that there’s a core assumptions that light does not interact with light. Check out Sean Carroll’s New York Times article Even Physicists Don’t Understand Quantum Mechanics. Damn right it is. "Nobody understands quantum mechanics," Richard Feynman bluntly stated. to be highly entertaining. Instead we get fairy tales and lies to children. Hence quantum field theory is up the creek without a paddle, and it’s been there for ninety years. In the theory of relativity, we can't solve the two-body problem. Math. But like the tiny electrons of quantum mechanics that can be both here and there, so can the field be both intangible and tangible. But in addition I think things are real whether you observe them or not. . The space does not contain free electrons and anti-electrons, and no, she hasn’t discovered anti-particles in the theory. You definately need to watch the episodes concerning his “profound discoveries & interpretations” that only he could have made. It’s nothing to do with some magical mysterious cosmic treacle. Quantum physics is a perturbative view of the world. Sometimes it is not even a probability distribution. The physicist are being taught that light does not interact with light because it is a required assumption of their analytical methods without which their theory end up up the creek without a paddle. . You definately need to watch the episodes concerning his “profound discoveries & interpretations” that only he could have made. So much so that even Einstein found himself estranged from the field. Carroll said this attitude goes back to the 1920s and Niels Bohr, and that people who didn’t like it found themselves estranged from the field. Lindgren and Liukkonen apply this recent knowledge of duality, and I think they come to the right conclusions. I’ve done the research. I completely agree with his point of view, both for physics and in finance. He’s right. Quantum mechanics comes along and says that whole experience is misleading, and that the best you can ever do is to predict the probabilities of outcomes. It’s the most intuitive thing in the world: If you don’t know where something is, it can be anywhere (or indeed nowhere); to know where it is you have to look. I was pleasantly surprised. You've got to remember we are talking about the technology which make nukes. I thought they were wrong on certain points. It was Wolfgang Pauli and Werner Heisenberg who were so determined to oppose Schrodinger’s 1926 wave in a  closed path that they promoted Yakov Frenkel’s point-particle electron. Goethe Observations by me and others of our tribe... mostly me and my better half--youngsters have their own blogs. how our classical reality emerges from a fundamental quantum theory). That was in a tweet kindly pointed out by Woit. Or An Electron Model Consistent with Electron-Positron Pair Production from High Energy Photons by Donald Bowen and Robert Mulkern. It was awaiting censorship, which was duly applied, courtesy of Woit. IMHO they don’t understand how gravity works or how electromagnetism works, so they’re going in the wrong direction. Carroll said the second problem was “we don’t agree on what it is that quantum theory actually describes”. Carroll finished up by saying “our best attempts to understand fundamental physics have reached something of an impasse”. “In a relativistic quantum system, the particle number is not a conserved quantity. They use it because it turns out to be useful for some things. It is very useful for calculating the *present value* of statistics of the properties modeled by the Hamiltonian as they evolve over future time, and is especially useful for calculating changes due to local perturbations of the initial conditions. And that “if nobody understands quantum mechanics, nobody understands the universe”. Carroll started by quoting Feynman, who said this: “I think I can safely say that nobody really understands quantum mechanics”. He described quantum mechanics as a black box, and said “physicists don’t understand their own theory any better than a typical smartphone user understands what’s going on inside the device”. In contrast, I think that the physics detective blog has provided a space where people can raise non-mainstream issues and consider ideas that genuinely push forward the development of new perspectives in physics. It certainly is. And then again, when I sort of understand… I do however, think that my arguments don’t contradict the general thrust of your position that gravity is an effect where the variation of energy in space is neither linear or isotropic. 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. The “physics” of how prices are formed doesn’t have anything to do with Brownian motion. Jim Baggot said “this kind of stuff is dangerous and threatens to undermine the authority of science just when it is under unprecedented attack from anti-scientific and pseudo-scientific propaganda”. But there is a high price to be paid for that understanding – admitting the existence of parallel universes. Carroll then said you’d think understanding quantum mechanics would be the priority among physicists worldwide. email. . The thing about Woit is that he portrays himself as some white-knight champion of rationality, nobly defending physics from pseudoscience. . I find his lunatic, narcissistic rants and self indulgent discoveries(?) I was schooled in electronics at university, so I know that, despite the non-linear quiescent nature of a circuit in which a transistor sits you can do small signal (perturbative) analysis of the circuit that looks at performance of the circuit (a physical thing) for small signals ( a local approximation to the behaviour of the circuit that assumes local linearity). What the actual outcome will be, we don’t know. The can be converted into other particles. Even Physicists Don’t Understand Quantum Mechanics Contact Us The Original "Liberal Forum" - Founded 2003 - America's Political Chat Room Powered by Invision Community The solution to the wave equation can be interpreted as leading to the (proper) time indexed flow of a “probability” distribution. But when you accept the weirdness of quantum mechanics [in the macro world], you have to give up the idea of space-time as we know it from Einstein. Thanks Greg. I know the insight is aimed at people learning QM and as that is correct and I have nothing to add. He wrote a piece called Quantum Supremacy II. No, it isn’t good for public relations. Woit isn’t just the Witchfinder General of String Theory. Quantum mechanics explained Dr. Morales tries to explain quantum mechanices without math. Uncertainty Study the uncertainty principle. ... ''I do not know everything; still many things I understand.'' A curious observer’s guide to quantum mechanics, pt. He’s a one-sided propagandist who censors the comments that point out the issues. And it only becomes real (incl. Heck, even if you used dozens of sentences, describing quantum mechanics would still be a trick, but let's dash out a few basic tenets, anyway: of natural selection, [quantum mechanics] has the most number of pieces of confirming, the course of one second [the Large Hadron Collider] collects trillions of bits of evidence that, I Don't Understand Quantum Mechanics, and That's Okay. 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