hackandthink

Robert W. Spekkens (and I guess Matt Leifer) tried to model quantum uncertainty classically.

(my gut feeling was: it works till it does not work)

"In defense of the epistemic view of quantum states: a toy theory"

https://arxiv.org/abs/quant-ph/0401052

luc4

To give some nuance on the quote "Experimental evidence + logical deduction can never prove that either the deterministic or the indeterministic view is impossible": We can indeed rule out a local hidden variable model [1].

So if the deterministic view is true, then it has to be a holistic theory. The hidden variables must be global, i.e. "accessible" throughout the universe. They cannot be attached to a particle as in Whittaker's model or Schrödinger's modification.

[1] https://en.wikipedia.org/wiki/CHSH_inequality

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artnap

Schrödinger's fix to Whittaker's photon argument was to let the hidden variable take any value between zero and one, instead of just two. It's funny that such a small change was enough to rebuild the quantum probabilities.

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euroderf

Can this shed light on determinism v free will ?

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yonisto

I was hoping it established that the cat is ginger

readthenotes1

A good example of a monster whose professional life benefits the world.

Worth the cost? I'd say not, but I'm generally an optimist.

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rramadass

Great article on an interesting topic.

The article mentions the great Physicist, Prof. S.N.Bose's take in a lecture delivered to the Indian Science Congress in 1944. It is titled "The Classical Determinism and The Quantum Theory".

The corresponding pdf can be found at Prof.S.N.Bose archive under Section 6 "Documents" titled "Presidential address at the Indian Science Congress, Delhi,1944 [Current Science, Vol XIII, No. 1]" - https://www.bose.res.in/Prof.S.N.Bose-Archive/

Prof. S.N.Bose is the Physics great after whom "Bosons", "Bose-Einstein Statistics", "Bose-Einstein Condensate" and even "Higgs Boson" are named - https://en.wikipedia.org/wiki/Satyendra_Nath_Bose

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justauserid

I just want to know what happened to the cat, eventually. Like for real – beyond the (academic) (un)certainties.

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