Delayed Choice Compatibly with Pilot Wave?

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Discussion Overview

The discussion revolves around the implications of a recent publication regarding the delayed choice experiment and its compatibility with pilot wave theory, specifically the De Broglie-Bohm interpretation of quantum mechanics. Participants explore whether the findings necessitate a reevaluation of how current and future measurements might influence past events within the framework of pilot wave theory.

Discussion Character

  • Debate/contested
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • Some participants assert that the new findings challenge the traditional understanding of particle-wave duality, suggesting it may be an outdated concept.
  • One participant proposes that pilot wave theory may need to evolve significantly to accommodate the implications of the experiment.
  • Another participant argues that the quoted statement from the publication is incorrect without additional qualifications, suggesting that Bohmian mechanics does not require acceptance of future events affecting past events due to the presence of wave functions.
  • There is a contention regarding the interpretation of the experiment's results and their implications for Bohmian mechanics, with some emphasizing the need for a nuanced understanding of the theory beyond just particles.

Areas of Agreement / Disagreement

Participants do not reach a consensus; multiple competing views remain regarding the implications of the delayed choice experiment for pilot wave theory and the interpretation of quantum mechanics.

Contextual Notes

Some participants express uncertainty about the accuracy of the quoted statement from the publication and its implications for Bohmian mechanics, highlighting the complexity of the discussion surrounding interpretations of quantum mechanics.

physicshelp11
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With this new publication in Nature, http://www.nature.com/nphys/journal/v11/n7/full/nphys3343.html, they have proven that "if one chooses to believe that the atom really did take a particular path or paths then one has to accept that a future measurement is affecting the atom's past."

Do advocates of pilot wave/De-Broglie-Bohm now have to accept that current/future events affect past events?
 
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Good question. My opinion: pilot wave theory have to morph into something more outlandish.
 
physicshelp11 said:
With this new publication in Nature, http://www.nature.com/nphys/journal/v11/n7/full/nphys3343.html, they have proven that "if one chooses to believe that the atom really did take a particular path or paths then one has to accept that a future measurement is affecting the atom's past."
You can't prove anything in science. You can falsify or confirm some theory or hypothesis.
This particular experiment seems to falsify particle-wave duality idea. Particle-wave duality is outdated idea that comes from Bohr's earlier ideas (or maybe misunderstanding of Bohr's earlier ideas).
physicshelp11 said:
Do advocates of pilot wave/De-Broglie-Bohm now have to accept that current/future events affect past events?
Particle-wave duality has nothing to do with pilot wave/De-Broglie-Bohm where both particle and a wave is there at all times.

There is an older thread about this experiment:
https://www.physicsforums.com/threads/delayed-choice-experiment-article-on-science-alert.816900/
 
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physicshelp11 said:
With this new publication in Nature, http://www.nature.com/nphys/journal/v11/n7/full/nphys3343.html, they have proven that "if one chooses to believe that the atom really did take a particular path or paths then one has to accept that a future measurement is affecting the atom's past."

Do advocates of pilot wave/De-Broglie-Bohm now have to accept that current/future events affect past events?
I cannot find the quoted sentence above at the link above.
Anyway, this quoted sentence, in the form in which it is written, is wrong. A correct version should be something like this:
If one chooses to believe that the atom really did take a particular path and that nothing else took both paths, then one has to accept that a future measurement is affecting the atom's past.
Note the added qualification "and that nothing else took both paths". This added qualification makes the statement (and the experiment) compatible with standard Bohmian mechanics. That's because in Bohmian mechanics it is not true that "that nothing else took both paths" (because there is a wave function that took both paths), so the conclusion of the statement does not refer to Bohmian mechanics. In other words, Bohmians do not need to accept that current/future events affect past events.

People with superficial understanding of Bohmian mechanics often forget that Bohmian mechanics is not only about particles. It is about particles and wave functions.

See also the initial post in
https://www.physicsforums.com/threads/who-is-puzzled-by-the-delayed-choice.402497/
especially item 7.
 
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