3 ms·

Not necessarily directly correlated, but I couldn't resist posting about the Couder/Fort oil drop experiments: https://www.youtube.com/watch?v=W9yWv5dqSKk http

Not necessarily directly correlated, but I couldn't resist posting about the Couder/Fort oil drop experiments: https://www.youtube.com/watch?v=W9yWv5dqSKk https://www.youtube.com/watch?v=W9yWv5dqSKk https://arxiv.org/abs/1401.4356 https://arxiv.org/abs/1401.4356

c3534l 10y ago
It's funny, because there's actually criticism in the comments that the problem with that video is it implied Pilot-Wave Theory is true.
- Natanael_L 10y ago
  I'm just wonder if Delayed Quantum Eraser can be replicated with it. I'm not so sure, unless the pilot wave is more of a field.
  - Strilanc 10y ago
    Making a delayed eraser would be neat, but it's just a matter of having the signal particle bias the eraser particle. It doesn't require non-local interactions (thanks to the delay). The actually difficult task, the one protected by mathematical theorems that should apply to oil droplets bouncing on water, is passing Bell tests.
    - GregBuchholz 10y ago
      Might be of interest: http://arxiv.org/abs/1406.0901 http://arxiv.org/abs/1406.0901 No-Go Theorems Face Background-based Theories for Quantum Mechanics "Recent experiments have shown that certain fluid-mechanical systems, namely oil droplets bouncing on oil films, can mimic a wide range of quantum phenomena, including double-slit interference, quantization of angular momentum and Zeeman splitting. Here I investigate what can be learned from these systems concerning no-go theorems as those of Bell and Kochen-Specker. In particular, a model for the Bell experiment is proposed that includes variables describing a 'background' field or medium. This field mimics the surface wave that accompanies the droplets in the fluid-mechanical experiments. It appears that quite generally such a model can violate the Bell inequality and reproduce the quantum statistics, even if it is based on local dynamics only. The reason is that measurement independence is not valid in such models. This opens the door for local 'background-based' theories, describing the interaction of particles and analyzers with a background field, to complete quantum mechanics. Experiments to test these ideas are also proposed."
      - kkylin 10y ago
        That's interesting. I haven't seen this paper before. None of the others I've read before (e.g., from Couder & collaborators on bouncing droplets) feature a fluid analog of entanglement. (For anyone interested, an example of a theory that derives Schroedinger from a classical particle interacting with a fluctuating background field can be found here: https://web.math.princeton.edu/~nelson/books/qf.pdf https://web.math.princeton.edu/~nelson/books/qf.pdf .)
anotheryou 10y ago
even prettier replication: https://youtu.be/YF5iHQMjcsM https://youtu.be/YF5iHQMjcsM edit: and some double-slit https://youtu.be/nsaUX48t0w8?t=4 https://youtu.be/nsaUX48t0w8?t=4
- Frompo 10y ago
  This must be one of the most amazing fluid dynamics videos I've seem :)

c3534l 10y ago

It's funny, because there's actually criticism in the comments that the problem with that video is it implied Pilot-Wave Theory is true.

Natanael_L 10y ago
I'm just wonder if Delayed Quantum Eraser can be replicated with it. I'm not so sure, unless the pilot wave is more of a field.
- Strilanc 10y ago
  Making a delayed eraser would be neat, but it's just a matter of having the signal particle bias the eraser particle. It doesn't require non-local interactions (thanks to the delay). The actually difficult task, the one protected by mathematical theorems that should apply to oil droplets bouncing on water, is passing Bell tests.
  - GregBuchholz 10y ago
    Might be of interest: http://arxiv.org/abs/1406.0901 http://arxiv.org/abs/1406.0901 No-Go Theorems Face Background-based Theories for Quantum Mechanics "Recent experiments have shown that certain fluid-mechanical systems, namely oil droplets bouncing on oil films, can mimic a wide range of quantum phenomena, including double-slit interference, quantization of angular momentum and Zeeman splitting. Here I investigate what can be learned from these systems concerning no-go theorems as those of Bell and Kochen-Specker. In particular, a model for the Bell experiment is proposed that includes variables describing a 'background' field or medium. This field mimics the surface wave that accompanies the droplets in the fluid-mechanical experiments. It appears that quite generally such a model can violate the Bell inequality and reproduce the quantum statistics, even if it is based on local dynamics only. The reason is that measurement independence is not valid in such models. This opens the door for local 'background-based' theories, describing the interaction of particles and analyzers with a background field, to complete quantum mechanics. Experiments to test these ideas are also proposed."
    - kkylin 10y ago
      That's interesting. I haven't seen this paper before. None of the others I've read before (e.g., from Couder & collaborators on bouncing droplets) feature a fluid analog of entanglement. (For anyone interested, an example of a theory that derives Schroedinger from a classical particle interacting with a fluctuating background field can be found here: https://web.math.princeton.edu/~nelson/books/qf.pdf https://web.math.princeton.edu/~nelson/books/qf.pdf .)

anotheryou 10y ago

even prettier replication: https://youtu.be/YF5iHQMjcsM https://youtu.be/YF5iHQMjcsM edit: and some double-slit https://youtu.be/nsaUX48t0w8?t=4 https://youtu.be/nsaUX48t0w8?t=4

Frompo 10y ago
This must be one of the most amazing fluid dynamics videos I've seem :)