Superposition of traps (thought experiment)

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Discussion Overview

The discussion revolves around a thought experiment involving the use of optical traps in an interferometer setup, exploring concepts of superposition, measurement, and the implications of using traps instead of screens to determine the path of photons. The focus is on theoretical implications rather than practical measurements.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant proposes using optical traps instead of screens in an interferometer, questioning whether this would lead to a heavier trap or maintain symmetry in superposition.
  • Another participant asks for clarification on which type of interferometer is being referenced.
  • A participant mentions the use of a beam splitter and emphasizes that the discussion is a thought experiment, focusing on pure states or density matrices rather than practical measurement devices.
  • There is a suggestion that if traps are placed on both paths and on either side of a balance, it raises the question of whether simply observing the traps would reveal the particle's location.
  • One participant challenges the clarity of the proposed setup and asserts that the balance will measure whatever it measures regardless of observation, indicating that the act of looking does not affect the outcome.

Areas of Agreement / Disagreement

Participants express differing views on the implications of using optical traps versus screens, and there is no consensus on how the proposed setup would function or what the outcomes would be.

Contextual Notes

There are limitations in the clarity of the proposed experimental setup, and the discussion relies on theoretical constructs that may not be fully defined or agreed upon by all participants.

PaleMoon
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Hi Pf
Instead of placing a screen on each path of an interometer i propose to place opticz traps.
in both cases it will unable the photon to go further.
i wonder if one on the traps will be heavier or if there will be symmetry (superposition).
 
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What interferometer would that be ?
 
it might use a beam splitter but remember that it is only a thought experiment.
It does not matter if there are no sufficiently precise measuring devices. my question is more about pure states or densitu matrices.
 
when we have screens on the paths we only have to open our eyes to see on which sreen the particle was. Suppose now that the traps are on the two paths and also on each side of a roberval balance. Have i only to open my eyes to see in which trap it is?
 
PaleMoon said:
it might use a beam splitter but remember that it is only a thought experiment.
It does not matter if there are no sufficiently precise measuring devices. my question is more about pure states or densitu matrices.
[QUOTE="PaleMoon]]when we have screens on the paths we only have to open our eyes to see on which sreen the particle was. Suppose now that the traps are on the two paths and also on each side of a roberval balance. Have i only to open my eyes to see in which trap it is?[/QUOTE]
You will have to describe your setup more clearly before anyone will be able to answer which trap absorbs more light. However, we can say that whatever the result is, it makes no difference whether you open your eyes or not - the balance will measure whatever it measures even if no one ever looks.
 

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