16 ms·
Close to absolute zero, particles exhibit their quantum nature
- DigitalJack 10y agoI highly recommend Richard Feynman's QED (quantum electrodynamics) lectures. You can find them by googling something like feynman qed lecture auckland. The quality of the videos is marginal, but the content is spectacular. I am not exaggerating or being metaphorical when I say my jaw dropped (open) while watching these. I intend on reading the book soon: http://www.goodreads.com/book/show/5552.QED http://www.goodreads.com/book/show/5552.QED “QED: The Strange Theory of Light and Matter”
- saganus 10y agoThanks for the recommendation. Just bought the book!. I love how Feynman explains things, and QED seems like a perfect subject to understand from him.
- tambourine_man 10y agoIt really is one of the best books I've ever read. The explanation of why the angle of incidence is equal to the angle of refraction, or how and why oil makes such pretty colors when mixed in water was mind blowing.
- lisivka 10y agoI highly recommend to watch this video first: https://www.youtube.com/watch?v=nsaUX48t0w8 https://www.youtube.com/watch?v=nsaUX48t0w8 , to get the idea. Then this: https://www.youtube.com/watch?v=WIyTZDHuarQ https://www.youtube.com/watch?v=WIyTZDHuarQ , for explanation. No need to read long books.
- tedsanders 10y agoThe pilot wave interpretation of quantum mechanics is not a consensus, or even mainstream view. It is not helpful to blankly suggest that these videos illustrate the answer.
- phest 10y agoIt's an interesting theory though. What makes it less mainstream than other interpretations? (And is any interpretation of quantum mechanics a consensus?)
- jfoutz 10y agoCan't say i can explain it, but the words you're looking for are "local realism". I really like the pretty pictures from walking droplets, and it makes the thing seem very intuitive. But they're a little disingenuous. It's easy to imagine, or just see a drop of water bouncing in the air on a wave of water. But all this stuff happens in 3d. There's (as far as i know) no separation like air and water. It's more like a sound wave expanding out in all directions. How do you surf on a sound wave? Not saying it can't be done, it's just that the pretty picture has to be a lot more complicated for the particle to have something to bounce off of. Maybe there are some weird hard thin shells that hover around particles. Who knows? For sure i can say 'not me'.
- lisivka 10y agoYep, you are right — 3D version will be very different. Why not to conduct such experiment in space, where 3D version can be constructed with ease? Moreover, electromagnetic waves are very different from sound waves, so physic process involving them will be very different. Can you imagine an experiment, which will be closer to reality?, e.g. spinning eccentric charged particles in space.
- Osmium 10y ago> (And is any interpretation of quantum mechanics a consensus?) There is, broadly speaking, a consensus view. Whether this is because the consensus best matches reality or whether it's dogmatic is probably up for debate, but I don't personally know any professional scientists who believe pilot wave theory (Bell's theorem largely disproved it).
- lisivka 10y ago
- highd 10y agoPlease don't suggest fringe views to people with no experience in the field.
- lisivka 10y agoIMHO, it's better explanation than God or half-dead cat. If you have better explanation, then film it, please — it will be very helpful.
- highd 10y agohttp://home.basu.ac.ir/~psu/Books/%5BRamamurti_Shankar%5D_Principles_of_Quantum_Mechanic(BookFi.org).pdf http://home.basu.ac.ir/~psu/Books/%5BRamamurti_Shankar%5D_Pr...
- lisivka 10y agoBook describes double-slit experiment but does not explain it. I read that when I was student 20 years ago. So, WHY single particles are developing interference pattern when sent one by one? Shut up and calculate is not an answer: https://en.wikipedia.org/wiki/Double-slit_experiment#Copenhagen_interpretation https://en.wikipedia.org/wiki/Double-slit_experiment#Copenha... Just by looking at video, it's clear that interference pattern appears because of interference of particle wave with itself. It's also clear that speed of sound in water is constant regardless of speed of particle, particle cannot reach speed above speed of sound in water, speed of particle affects particle itself, and so on.
- louthy 10y agoI have bought the book many times, as I have given previous copies away to friends when the subject comes up. I wish science at school was first presented this way. It clarifies so much, so quickly, and without anything really complex behind it. Feynman's real-world examples (mirrors, water refraction, etc.) are so clear, it's really a joy to read.
- edejong 10y agoThe book is first among a long list of physics books I sound advice to the neophyte. I first came about the book in the library when I was twelve and it triggered my lifelong interest in nature and technology. Good reminder to read it again.
- mentioned_edu 10y agoThis has been on my list for a while
- jfoutz 10y agoThanks for the video reference. Part way through corpuscles of light (1/4). Feynman is engaging. From the bit i've seen, yeah, i second the recommendation.
- karolisram 10y agoFrom what I read in the reviews, some physics background is needed to understand this book. Could you perhaps recommend some reads/lectures/moocs that would prepare a physics newbie to be able to read this and comprehend most, if not all, of it?
- louthy 10y agoI'm not sure I agree with that. However Feynman's other book can help: 6 Easy Pieces http://amzn.to/2ej0bq0 http://amzn.to/2ej0bq0
- dschiptsov 10y agoPerhaps, this is the case when an observer affects the observation. It appears to the instrument, created according to a model, that electrons are "like grands of sand" when they should be "fields". But how could these "fields" in principle be observed with an instrument made out of atoms?
- themgt 10y agoOpen-access in Nature: http://www.nature.com/articles/ncomms13009 http://www.nature.com/articles/ncomms13009
- plandis 10y agoThe title seems tautological. If the number of energy states of a system are reduced to very few of course the quantum mechanical effects will be more noticible since the "blurred" system that fakes continuity is no longer there to mislead.
- jaunkst 10y agoI've imagined a universe at quantum rest.
- Avshalom 10y agoSo I'm drunk and only have a B.S. in physics but whats the tl:dr for this versus Einstein-Bose condensates?
- rubidium 10y agoThis is with electrons and solid state physics where the quantum effects show up at a few mK versus atomic BEC's which must be cooled to the 10's-100's of nK.