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Quantum weirdness is everywhere in life

aeon.co

21–30 of 85 posts

Re: Quantum weirdness is everywhere in life

#21
post #5

Each of the main points of the article has the feel that the conclusions are speculative wrt quantum mechanics -- any experts able to comment on them? Feels like an article over-selling inconclusive results.

It's the difference between quantum and quantum[tm] "as used in publishing[tm] to sell content[tm]".

Re: Quantum weirdness is everywhere in life

#23
post #20

It's always a shame when the Copenhagen interpretation of quantum mechanics is presented as how reality works. Most of the perceived weirdness of QM comes from the leaps of faith required to make the Copenhagen interpretation work.

There's a lot of truth in that, and the orthodox interpretation is indeed riddled with incoherence. But what fascinates me is that after so much effort, the quantum community seems to be further away than ever from coming to a consensus on interpreting the theory. Every proposed interpretation does away with some foundational issue, yet introduces another in the process.

They may not have a consensus, but why do you think they're further away from consensus than they were in the past?

Re: Quantum weirdness is everywhere in life

#24
post #14
post #3

That claim about DNA, mutations and quantum effects - well it makes the paper less credible. DNA and its replication and mutations are largely non-quantum and it is also not true at all that in DNA every matters; minor alterations of the do not produce invalid code.

Protein folding is a quantum thing indeed. And folding matters no less than the amino acids sequence.

Folding has nothing to do with DNA.

Re: Quantum weirdness is everywhere in life

#25
post #23
post #20

Earlier quoted context omitted.

There's a lot of truth in that, and the orthodox interpretation is indeed riddled with incoherence. But what fascinates me is that after so much effort, the quantum community seems to be further away than ever from coming to a consensus on interpreting the theory. Every proposed interpretation does away with some foundational issue, yet introduces another in the process.

They may not have a consensus, but why do you think they're further away from consensus than they were in the past?

If you mean "what has led you to think they're further away from consensus": mostly just gut feeling, as a (younger) member of that community. I've not seen any rigorous and comprehensive studies of which interpretations garner the most support, but it does seem like popularity is currently divided between the orthodox and several other interpretations that have evolved from "niche" to "significant minority" in recent years.

If instead you mean "by what process are they further away from consensus": I would suggest that the recent surge of research in quantum information theory has stimulated a greater interest in foundational issues, which in turn has led to an invigoration of the interpretations debate.

Re: Quantum weirdness is everywhere in life

#28
post #4

"The colour of your eyes, the shape of your nose, your intelligence or propensity for disease are encoded at the quantum level." Uh, nope.

It is Schroedinger who said that, who, considering his time in history, had a very broad view of what quantum mechanics and DNA are. Given his high level viewpoint he was correct, considering that he was making a reference to interactions at the level of the universe. Although it is actually your DNA which codes the colour of your eyes, it is also true that quantum mechanics plays a part in the DNA encoding itself, which is what makes his statement true. And the fact that furthermore an exact process was discovered actually makes his statement a remarkably good prediction, as shown here: "And, just as Schrödinger predicted, ‘every group of atoms’ does indeed play ‘an individual role’, with the position of even individual protons – a quantum property – determining each genetic letter".

Re: Quantum weirdness is everywhere in life

#29
post #25
post #23

Earlier quoted context omitted.

They may not have a consensus, but why do you think they're further away from consensus than they were in the past?

If you mean "what has led you to think they're further away from consensus": mostly just gut feeling, as a (younger) member of that community. I've not seen any rigorous and comprehensive studies of which interpretations garner the most support, but it does seem like popularity is currently divided between the orthodox and several other interpretations that have evolved from "niche" to "significant minority" in recen…

http://www.preposterousuniverse.com/blog/2013/01/17/the-most...

In short Copenhagen still (sadly) rules the day, followed by many worlds and QIT.

Re: Quantum weirdness is everywhere in life

#30
post #6
post #4

"The colour of your eyes, the shape of your nose, your intelligence or propensity for disease are encoded at the quantum level." Uh, nope.

That quote instantly makes me lose any credibility in the author. Is he/she really that ignorant of basic biology, or am I misunderstanding something?

The author is a molecular biologist with several published books and over 100 peer-reviewed articles, so he definitely has a grasp on basic biology. I think that what you are missing is the assertion that each atom plays an individual role in the process. That is, there are low-level processes that take place on a small enough scale to depend on quantum effects that make direct contributions to DNA. The point is that quantum physics contributes a lot more than we usually think to macroscopic processes like biology.
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