Single particle creates interference after double slit - Wave particle duality at the workshop

heligone · 16K views · 2013 · 1:02

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Quantum physicsEveryday physics & science demosdemo

Why Hacker News recommends it

HN users share it to build intuition about wave-particle duality and pilot-wave ideas in quantum mechanics threads.

What it is

A short demo of a walking droplet on a vibrating silicone oil bath passing through a double slit and producing interference, a macro-scale analogue of pilot-wave behavior.

Recommended by 3 HN commenters across 4 different months, 2015 to 2021.

What Hacker News said

Recommends lisivka · 2016-11 · on “Close to absolute zero, particles exhibit their quantum nature”

I highly recommend to watch this video first: [this video] , to get the idea. Then this: [LINK] , for explanation. No need to read long books.

Recommends tsimionescu · 2020-02 · on “Double Slits with Single Atoms”

Interestingly, there is a (possibly still incomplete?) model of QM that explains this mystery and can even be replicated in human scale experiments: The de Broglie-Bohm pilot wave model. In this model, both the wave and the particle are simultaneously real. the particle is being moved around by the wave. When we get near the double slit, the wave naturally travels through both slits and forms an interference pattern.The particle randomly moves through one of the slits, and is them carried further by the interference pattern, the highest probability being that it will be carried to one of the local maxima. The nicest part is that this exact behavior can be seen by bouncing a droplet of oil or

Recommends drran · 2020-08 · on “Ask HN: What is a science fact that blew your mind when you learned it?”

If you want to develop intuition, look at this video: [this video] . Please note that physics as science in general is advancing constantly, but mainstream physics advances in sprints. Currently, walking droplets and Pilot Wave Theory are not good enough to be included into mainstream physics.

Recommends drran · 2020-11 · on “A Spacetime Surprise: Time Isn’t Just Another Dimension”

IMHO, you should look at this video, where water droplet at macro scale « exists in two places at once » (demonstrates self interference when passing two slits). [this video]

Cites lisivka · 2015-09 · on “The 'Sharpest Picture Yet' of the Higgs Boson”

For me, whole Theory of Relativity and Quantum Mechanics looks like huge scam. Mathematics is Turing-complete, so proper formula with right magic constants can separate dogs from cats (see neural networks for example: they are pure mathematics). However, I had belief in Theory of Relativity for my whole life until I saw three effects: double slit experiment at macro level [0], magnetic foam at the edge of Solar system [1], and Sagnak in _linear_ motion [2]. Sorry, but I lost my belief and I want explanation, not a magic formula. [0] [this video] [1] [LINK] [2] [LINK] , [LINK]

Cites lisivka · 2016-11 · on “EmDrive study officially published”

Can I ask a dumb question? If I will create model of our Universe in a computer language and I will chose to use five-dimensional array for ease of computation, will our Universe have fifth dimension then? Despite that randomness is used in calculations, it is very unlikely that our Universe is random, thus "probability wave" is just mathematical abstraction, disconnected from reality, not a real thing. It just a particle, with concentrated rings of magnetic field around it (like rings of magnetic field around magnets). It moves fast, and it motion is influenced a lot by fluctuations in quantum field, so it is impossible to measure position of a particle precisely, like motion of a single at

Cites lisivka · 2017-01 · on “The Trouble with Quantum Mechanics”

Did you saw double slit experiment reproduction in 2D macro?: [this video] Observer breaks interference pattern.

Cites v_lisivka · 2018-01 · on “The Quantum Theory and Reality (1979) [pdf]”

Interference is very fragile. It used to create the most sensitive scientific instruments. It is very easy to disturb self-interference in double slit experiment. [this video]