“If you have nothing in quantum mechanics, you will always have something.”

— Lawrence M. Krauss

"A Universe From Nothing" by Lawrence Krauss, AAI 2009 http://www.youtube.com/watch?v=7ImvlS8PLIo

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Lawrence M. Krauss 21

American physicist 1954

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“Weinberg says that "we want to know what's happening out there". But this is just the standard anti-quantum zealots' misunderstanding of the essence of quantum mechanics. Quantum mechanics says that all knowable things about the physical system must be obtained through a measurement whose outcomes are predicted via the Born rule. There is nothing else happening out there, at least nothing else knowable that is happening out there! So quantum mechanics does answer the question what is happening out there and the claim that quantum mechanics is incomplete in this sense is simply a lie.”

Luboš Motl (1973) Czech physicist and translator

https://motls.blogspot.com/2018/09/a-recent-dissatisfied-weinbergs-talk-on.html
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“Considering the pervasive importance of quantum mechanics in modern physics, it is odd how rarely one hears of efforts to test quantum mechanics experimentally with high precision.…The trouble is that it is very difficult to find any logically consistent generalization of quantum mechanics. One obvious target for generalization is the linearity of quantum mechanics, but if we arbitrarily add nonlinear terms to the Schrodinger equation, how do we know that the theory we obtain will have a sensible physical interpretation? At least in part, it is the dearth of generalized versions of quantum mechanics that has made it so hard to plan experimental tests of quantum mechanics.”

Steven Weinberg (1933) American theoretical physicist

"Testing Quantum Mechanics" http://www.sciencedirect.com/science/article/pii/0003491689902765, Annals of Physics (1989)

“Quantum mechanics as it stands would be perfect if we didn't have the quantum-gravity issue and a few other very deep fundamental problems.”

Gerardus 't Hooft (1946) Dutch theoretical physicist and Nobel Prize winner

Does Some Deeper Level of Physics Underlie Quantum Mechanics? An Interview with Nobelist Gerard 't Hooft http://blogs.scientificamerican.com/critical-opalescence/2013/10/07/does-some-deeper-level-of-physics-underlie-quantum-mechanics-an-interview-with-nobelist-gerard-t-hooft/

“The trouble I have with astrophysics or quantum mechanics is the same problem I have with philosophy; which is: initially it is mind blowing, then it is fascinating, then it is disturbing, then it is almost uncomprehensible, then it's fascinating again, then you disappear up your own ass.”

Craig Ferguson (1962) Scottish-born American television host, stand-up comedian, writer, actor, director, author, producer and voice a…

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“It has always seemed to me that the hard thing to understand is not quantum mechanics, but where classical mechanics comes from (in the sense of how it emerges from a “measurement”).”

Peter Woit (1957) American physicist

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“My own conclusion is that today there is no interpretation of quantum mechanics that does not have serious flaws. This view is not universally shared. Indeed, many physicists are satisfied with their own interpretation of quantum mechanics. But different physicists are satisfied with different interpretations. In my view, we ought to take seriously the possibility of finding some more satisfactory other theory, to which quantum mechanics is only a good approximation.”

Steven Weinberg (1933) American theoretical physicist

Source: Lectures on Quantum Mechanics (2012, 2nd ed. 2015), Ch. 3: General Principles of Quantum Mechanics

“When you have something to do, do it. When you have nothing to do, sleep.”

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“You have learnt something. That always feels at first as if you had lost something.”

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“There’s something I’ve been working on for more than a year — maybe it’s just an old man’s obsession, but I’m trying to find an approach to quantum mechanics that makes more sense than existing approaches. I’ve just finished editing the second edition of my book, Lectures on Quantum Mechanics, in which I think I strengthen the argument that none of the existing interpretations of quantum mechanics are entirely satisfactory.”

Steven Weinberg (1933) American theoretical physicist

Steven Weinberg, in " Science’s Path From Myth to Multiverse https://www.quantamagazine.org/20150317-sciences-path-from-myth-to-multiverse/" by Dan Falk (March 17, 2015)

“Quantum mechanics is weird. I don't understand it. Just live with it. You don't have to understand the nature of things in order to build cool devices…If you can figure out how to take advantage of this quantum multitasking, we can build computers that can do computations that no classical computer could do even if it were the size of the entire universe.”

Seth Lloyd (1960) American engineer

Seth Lloyd, cited in: Scott Dewing (2011) "Seth Lloyd on quantum computing" blog.insidethebox.org, 9/23/2011

“If you have nothing in quantum mechanics, you will always have something.”

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