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Quantum Mechanics Itself as Emergent 'Phenomenon'?

Recently, we've been talking about emergence - more explicitly about emergent phenomena in many body systems. But what if the concept of emergence would not only apply 'within' quantum mechanics but also 'outside' the theory? What if quantum mechanics itself is an emergent theory from a classical-type underlying 'reality'? This is exactly the approach of an interpretation of quantum mechanics, called emergent quantum mechanics (EmQM).

Where is EmQM located in the 'zoo' of interpretations?

The 'zoo' of interpretations and alternative theories of quantum mechanics can be classified by their answers to the violation of Bell's inequalities. Bell's Theorem is a theory-independent result and therefore must hold for any possible approach which reproduces the results of standard quantum mechanics. Roughly speaking, the theorem's consequences are that one either has to give up the traditional understanding of realism, or the idea of locality. E.g. Rovelli's approach and QBism belong to the camp which gives up traditional realism and adheres to locality, whereas Bohmian Mechanics sticks to realism and therefore embraces nonlocality. In general, hidden variable theories belong to this 'realist' camp.

EmQM suspects a locally deterministic theory from which standard quantum mechanics emerges. Walleczek and Groessing (p. 2, [1]) suppose that instead of "absolute quantum randomness" there might be "quantum interconnectedness" - indicating the presence of some kind of nonlocality, e.g. nonlocal causality. Hence, this approach seems to belong to the above called 'realist' camp, in which a traditional understanding of realism is embraced and the price to pay is nonlocality, more neatly called "quantum interconnectedness".

Why EmQM?

Walleczek and Groessing [1] argue that a metaphysical fundament is needed in order to unify general relativity and quantum mechanics. Since general relativity is strictly deterministic and standard quantum mechanics inherently indeterministic, the metaphysical fundament of each theory starkly opposes each other such that the lack of unification seems inevitable. However, setting a microscopically causal fundament for both branches of physics, as well as the focus onto emergent phenomena, might yield a solution. For instance, the theory of quantum gravity already relies on the idea of emergent spacetime - together with EmQM it may be possible to lay a metaphysical framework of 'all physics'. Nevertheless it might be questionable, in my view, how this is supposed to work with an approach as EmQM in which nonlocality is a cornerstone, i.e. possibly causing trouble with causality as we know it from relativity.

EmQM and Bohmian Mechanics

Since EmQm and Bohmian Mechanics (BM) belong to the same, 'realist' camp, both seem to be related. Both claim to describe the underlying 'reality' beneath standard quantum mechanics. Both approaches share the belief that standard textbook quantum mechanics does not have descriptive character regarding the nature of reality, even though the theory is empirically successful. Then, standard quantum mechanics is regarded as an 'effective' theory.

However, two approaches can be well compared by regarding how they attempt to reproduce standard quantum mechanics. One main aspect in this respect is the appearance of randomness. Both approaches claim to be fundamentally deterministic and therefore have to explain why we experience the randomness of standard quantum mechanics in our laboratories. Bohmians do this by introducing so called "absolute uncertainty" [3], which is a consequence of the quantum equilibrium hypothesis. Effectively, this means that a universe in which Bohmian Mechanics governs the dynamics, it is impossible to gain knowledge about the configuration of a system beyond the probability distribution determined by the wave function ρ=|ψ|^2. Hence, the complete configuration of point particles, their positions and velocities do exist, but there is no experimental access to it. This limited knowledge is supposed to be the source of randomness and uncertainty that we encounter in standard quantum mechanics:

"This absolute uncertainty is in precise agreement with Heisenberg's uncertainty principle. But while Heisenberg used uncertainty to argue for the meaninglessness of particle trajectories, we find that, with Bohmian mechanics, absolute uncertainty arises as a necessity, emerging as a remarkably clean and simple consequence of the existence of trajectories." (p.864 [3])

Instead of making use of a (more or less ad-hoc) hypothesis, the appearance of randomness in EmQM seems a bit more natural: Only because the underlying dynamics is supposed to be deterministic, this does not imply pre-determination. This is something one can already observe in purely classical systems: The more complex a system is, the more uncertain is the outcome (often referred as "deterministic chaos"). A minor change in the boundary conditions can cause a huge change in the result. Thus, the central point is emergence:

"Critical in this context is that emergent phenomena are subject to unpredictability as a consequence of the intrinsically self-referential nature of the governing dynamics [...]." (p.5 [1])

In comparison, BM formulates its theory in a rather rigid manner. It formulates postulates from which the theory can be deduced. The issue with this is that these postulates have kind of an ad-hoc character. In my view, EmQM circumvents these problems by being less strict/definite. This approach does not seem to have a fixed formalism yet (at least I haven't found analyses on the same level of rigor as there are for BM), while the research seems to be more focused on exploring how emergence can enter the picture - as e.g. 't Hooft does in [2], where he describes explicit examples of possibly emergent symmetries. (Disclaimer: maybe my impression is incorrect, since I have only superficial knowledge about EmQM.)

Regardless of this point, both approaches seem to be interconnected in the end. Walleczek and Groessing (p.2 [1]) claim that a future EmQM would include BM. Hence, in my view, it might be possible that EmQM might support BM in the sense that it lifts the necessity of possibly ad-hoc appearing postulates as formulated in BM. Thus, any theory of quantum mechanics (orthodox or unorthodox) might not only yield emergent phenomena within the theory but quantum mechanics might unravel itsel as an emergent 'phenomenon'.

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References:

[1] Walleczek, Groessing, Is the World Local or Nonlocal? Towards an Emergent Quantum Mechanics in the 21st Century, arXiv:1603.02862, 2016

[2] 't Hooft, Emergent Quantum Mechanics and Emergent Symmetries, arXiv:0707.4568, 2007

[3] Dürr, Goldstein, Zanghí, Quantum equilibrium and the origin of absolute uncertainty. J Stat Phys 67, 843–907 (1992). https://doi.org/10.1007/BF01049004

The best advice really is to just write. Write badly - purple prose, stilted conversations, rambling descriptions. Don't delete it, pass go, take your $200, save all your garbage in a big folder. Look at how much you've made - it doesn't matter if it isn't perfect, isn't polished, it was practice. Every time you write you learn a little more, and find another piece of your voice.

like there’s this whole thing in this book about how your brain grows stronger and healthier by practicing responding to stress in healthy ways,

because if a stressor is predictable and you feel a sense of control over it, you habituate and stop reacting to it,

but if it’s random and unpredictable you have the opposite response and become sensitized, so your reaction actually gets more and more extreme.

(if you hear a loud noise at predictable intervals you’ll soon stop noticing or reacting, but if you hear it at random intervals you’ll become sensitive to it and anxious.)

so one way to help people who have adverse reactions to reminders of trauma is to give them control over how they’re reminded of the trauma,

because it helps the brain practice responding to stress in a safe way so you can habituate to the stress response.

which is why if someone tags something for a trigger and you still choose to look,

it’s actually an act of healthy resistance against your reaction to that trigger (because it teaches your brain to habituate),

but encountering something triggering in a random and unpredictable way actually increases your stress response and makes you more sensitive to the trigger.

so people who are against trigger warnings because “you have to learn to cope” are actually taking away your tools for learning to cope,

because encountering stressors in a way that further strips you of control over your trauma is never, ever helpful.

it’s a lot of stuff i kind of knew but integrated and explained with more context and science

“The only way to handle danger is to face it. If you start getting frightened of it then you make it worse because you project onto it all kinds of bogies and threats which don’t exist in it at all.

Whenever you meet a ghost, don’t run away. Because the ghost will capture the substance of your fear and materialise itself out of your own substance. It will kill you eventually because it will take over all your own vitality. 

So, then, whenever confronted with a ghost walk straight into it. And it will disappear.”

— Alan Watts

stupid leftists and their belief in *checks notes* the intrinsic value of human life

c a s u a l 

Hi, I was wondering if you have any tips for being self taught (You're like, extremely brilliant, by the way)

hi, thank you so much, that’s so sweet!!<3 here you are:

a guide to be self-taught for all the knowledge lovers out there

1. Listen to yourself. Don’t judge your thoughts and their form. Most people are MUCH more intelligent and creative than they think they are. They just don’t notice it as they don’t pay attention to their thoughts, don’t value them the way they should.

Buy a notebook. Note every thought that has any meaning, however weird, bad or unsignificant it may seem. Don’t make it a diary, a diary is filtered. It gives you an objective, makes you try to shape your ideas a certain way. Screw the dates, calligraphy, aesthetic, screw making any sense. The whole point is to contain an unchanged stream of consciousness, to keep it unedited, so you wouldn’t lose anything. I call it A documentation of existence - you neither have to agree with what you write, nor believe it’s yours, simply acknowledge it exists.

You have no idea how many times I made a stupid note at 4am that everyone else would ignore but that later on got transformed into a whole project.

2. Sleep well and USE THAT TIME. I’m surprised how few people understand and appreciate the power of sleep. Come on, it’s literally the door to your unconsciousness, the amount of opportunities it gives is astonishing!

I used to not get it. When I was a kid I hated sleep so much, I would refuse to go to bed sometimes as I thought of it as a waste of time. In primary school I wanted to reduce my sleep time so much, I started to highly experiment on it and even followed the Uberman Schedule for some time. Now I know sleep is actually a powerful instrument that can help you increase your potential.

Learn about it, research LD, OOBE (be careful with it though) and most importantly sleep programming. They can all be extremely beneficial! Statistically we’re asleep for 1/3 of our lives so don’t waste that time.

3. Mnemotechnics. Find out what way of remembering information works best for your brain and use it. I especially recommend The Mind Palace Technique. You may’ve seen it on Sherlock and thought it’s pure fiction but I assure you it’s very much real and it’s the most effective mnemotechnic I’ve ever used. Seriously, I’m surprised how much I remember thanks to it.

If you use it right, it’s actually so efficient you may remember those things for years, if not forever - so don’t put useless and stupid stuff there. I once did it and I regret it SO much, it’s been years and this idiotic picture has just engraved in my brain... anyway, MNEMOTECHNICS!

4. Read. Read things you don’t agree with. Read things you hate. Read everything that makes you feel something. Same way with movies, plays, music, etc. Consume as much culture as you can, surround yourself with it. Let your knowledge grow, your viewpoint change, allow yourself to be influenced by the world.

5. Use drugs wisely. And yes, caffeine, theine, nicotine and alcohol do count. They have a massive influence on your brain, please don’t let them destroy it. Be especially careful with cannabis, it lowers your IQ significantly, even used only a handful of times.

6. Acknowledge that you will lose motivation and know what to do about it. It’s perfectly normal! Please never beat yourself up for it, it will only make everything worse. It’s important that you find your own way to deal with it, but if you want to know mine: I just romanticize the hell out of everything. Learning is so much easier and more enjoyable when you do it on your own terms and do it with passion.

Working on a maths assignment an hour before the deadline, irritated you have to do so, trembling in fear that you won’t make it on time? terrible, horrendous, worst experience ever.

BUT

Sitting under a tree, birds singing in the background, while you’re doing mathematical equations, thus using a beautiful way of allowing yourself to explore the universe you’re so fascinated by? - marvelous, astonishing, groundbreaking.

Seriously, just love what you do. Love everything.

7. Learn what you WANT to learn about, not only what you have to. Look for the quirks.

Usually the reason why people hate a subject is that the only way they look at it is through the eyes of the education system. Come on, ancient history is boring? Sappho had a fake husband whose name was literally Dick Allcock from Men Island. Most schools teach to stay inside the box and consume only what is useful or necessary, stripping you off any passion. Screw them. Useless facts are amazing.

8. Sudoku and chess. They increase your IQ, improve memory, creativity, problem-solving, reading skills, concentration... even fuel dendrite growth! Great excercises for planning and foreseeing. Also, they’re kinda cool, 10/10.

9. A HEALTHY DIET, REPEAT IT AFTER ME.

10. Never be scared of making mistakes or sounding stupid. Ask for help. It’s crucial, especially when you’re learning a new language. You’ll never speak it if you’re scared of twisting pronunciation or making a grammatical error. Something done not perfectly is still so much better than not done at all.

bonus: Don’t trust Duolingo. I just had to say it.

That’s it, hope this helps! If anyone has any more questions, feel free to ask.

a fantasy

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