Understanding Bohmian Mechanics of Instrumentalists

[Demystifier]

Does the Legget-Garg inequality tell us anything about Bohmian Mechanics, or does it simply not apply?

The LG inequality is about temporal correlations. Some people (including @A. Neumaier) were arguing in the past that BM does not correctly reproduce the quantum mechanical temporal correlations. But it is wrong. The measurable temporal correlations in QM are the same as measurable temporal correlations in BM. To understand that, one has to take into account what happens with the wave function at the time of measurement. It gets entangled with the wave function of the detector, which is responsible for an effective (apparent) wave function "collapse". More details can be found in the book F. Laloe, "Do We Really Understand Quantum Mechanics?", Appendix I.

 

[physika]

"'Created' seems to imply that a particle is not the effect of its antecdent state, while a particle that is 'destroyed' wouldn't be "the cause of the state that is to follow". Am I correct in that characterisation of the notions of 'create' and 'destroy'?

Of course, this would be perfectly in-keeping with the notion of an indeterministic interpretation but it would seem to require an incredibly 'extraordinary' explanation. Again, relating it back to the age-old question, how can a particle be created from absolutely nothing? How can something come from absolutely nothing? How can a particle then simply cease to have any properties whatseover?

Good points.

 

[PeterDonis]

Good points.

No, they're not. See post #6.

(When responding to a post that was made quite some time ago, it's a good idea to read the thread first to see if others have already responded to it.)

 

[physika]

In physics it's that each state in a given physical world was always a fact and could never have been differently if you rewind the tape with the same initial conditions.

That is called, Fatalism, a " flavor" of determinism.

...without the need to have read subsequent posts

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[physika]

Even in a timeless universe with no events unfolding, it would still be a complete mystery why things are correlated that show no causal connection.

all already written.

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