Can Bohmian Mechanics deal with photons?

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Discussion Overview

The discussion centers on the applicability of Bohmian mechanics to the behavior of photons, particularly in the context of the LIGO experiment. Participants explore the relevance of different interpretations of quantum mechanics when analyzing photon paths and their implications for gravitational wave detection.

Discussion Character

  • Debate/contested
  • Conceptual clarification
  • Technical explanation

Main Points Raised

  • One participant questions the necessity of Bohmian mechanics for understanding photon paths in LIGO, suggesting that interpretations of quantum mechanics may not be required for this problem.
  • Another participant explains that while Bohmian mechanics traditionally uses particle ontology, it can also accommodate field ontology, which may be more suitable for photons.
  • It is noted that in the context of LIGO, the complexities of entanglement and relativity are not significant, allowing for the construction of meaningful particle paths for photons.
  • Some participants emphasize that the interpretation of quantum mechanics should not dictate the approach to a problem, indicating that it is legitimate to question the relevance of specific interpretations in certain contexts.
  • There is mention of LIGO's use of high-intensity laser beams, which can be understood in classical terms, suggesting that classical light behavior may dominate in this experimental setup.

Areas of Agreement / Disagreement

Participants express differing views on the necessity and relevance of Bohmian mechanics for analyzing photon behavior in LIGO. There is no consensus on whether this interpretation is essential for the problem at hand.

Contextual Notes

The discussion highlights the limitations of applying different ontological frameworks to photons, particularly in the context of quantum field theory versus classical interpretations. The role of intensity in LIGO's operation and its implications for understanding light behavior are also noted.

Spinnor
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What is the state of the art, Google does not turn up much published work. I would like to be able to consider photon paths through LIGO.

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Thank you.
 
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Why do you need Bohemian(!) Mechanics for that?
 
martinbn said:
Why do you need Bohemian(!) Mechanics for that?
Moderator's note: I have corrected the thread title to "Bohmian".
 
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martinbn said:
Why do you need Bohemian(!) Mechanics for that?
We don't, because if we dislike how an interpretation works for a particular problem we don't have to use that interpretation while working that problem. But it's still legitimate to ask how a particular interpretation handles some particular problem.
 
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Bohmian mechanics is about interpreting quantum theory in terms of classical-like ontology. The best known ontology of that kind is particle ontology, but Bohmian mechanics works also with other kinds of classical-like ontologies, such as field ontology (suitable for quantum field theory) and even string ontology (suitable for string theory). In the case of photons particle ontology is not very suitable in general, field ontology is much more suitable. In field ontology, there is no such thing as photon paths. See e.g. my https://arxiv.org/abs/2205.05986 .

However the LIGO experiment is, from a Bohmian point of view, rather simple, because entanglement of photons, creation/destruction of photons, and relativity do not play important roles. In such situations particle ontology for photons works well. So if one wants, one can construct meaningful particle paths of photons.
 
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Nugatory said:
We don't, because if we dislike how an interpretation works for a particular problem we don't have to use that interpretation while working that problem. But it's still legitimate to ask how a particular interpretation handles some particular problem.
Yes, if it is a QM question. If it is about gravitatiinal waves and LIGO, it is legitimate to ask "Why do you need so and so interpretation of QM?"
 
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martinbn said:
Yes, if it is a QM question. If it is about gravitatiinal waves and LIGO, it is legitimate to ask "Why do you need so and so interpretation of QM?"
Indeed, LIGO works with a very high intensity laser beam, and its high intensity implies that, to a large extent, it can be understood in terms of classical light. The high intensity is needed so that even tiny fluctuations of the gravitational field result in detectable changes of light intensity due to interference.
 
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