3 ms·

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

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 .)

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 .)