Half silvered mirror experiments

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Discussion Overview

The discussion revolves around the mechanics of half-silvered mirrors and beam splitters in the context of Wheeler's delayed choice experiment. Participants explore the implications of manipulating path lengths in interferometers and the nature of quantum interference, particularly regarding photons and silver atoms.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant questions whether varying the path length in Wheeler's setup can direct all photons to one detector, raising concerns about the nature of uncertainty in this context.
  • Another participant argues that the mechanism of a beam splitter is not about aiming photons at silver atoms but rather involves the statistical character provided by the cross-section of silver atoms for scattering or absorbing photons.
  • There is a suggestion that adjusting the legs of the interferometer leads to quantum interference that cancels one channel, allowing the photon to have a single path for scattering.
  • A later reply seeks clarification on why the photon can consistently follow the same path in repeated experiments.
  • One participant notes that interference can be constructive in one channel and destructive in another, indicating a nuanced understanding of the interference patterns involved.

Areas of Agreement / Disagreement

Participants express differing views on the role of beam splitters and the nature of photon paths in the experiment. There is no consensus on the implications of these mechanisms or the handling of uncertainty.

Contextual Notes

The discussion includes assumptions about the behavior of photons and silver atoms, as well as the statistical nature of quantum processes, which remain unresolved.

erwinskat
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Can I ask a stupid q? Using Wheeler's delayed choice experimental setup, one can vary the path length of one of the legs. This enables making all the photons end up at one detector and none at the other. Is this correct? If so, where did the uncertainty go? Can the interference pattern be manipulated by the experimenter to essentially cancel out the quantum jitters so the photons can be aimed at a silver atom or between silver atoms?
Thanks in advance your help.
 
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In my opinion, the working mechanism of a beam splitter doesn't have to do with aiming the photon at the silver atoms or between them. All silver atoms may have a cross-section for the process of scattering/absorbing the photon, and is this cross-section which provides the statistical character of this system.

Adjusting the legs of the interferometer produces quantum interference which cancels out one of the channels, leaving to the photon just one way to go, just one way to be scattered.
 
DaTario said:
In my opinion, the working mechanism of a beam splitter doesn't have to do with aiming the photon at the silver atoms or between them. All silver atoms may have a cross-section for the process of scattering/absorbing the photon, and is this cross-section which provides the statistical character of this system.

Adjusting the legs of the interferometer produces quantum interference which cancels out one of the channels, leaving to the photon just one way to go, just one way to be scattered.

Thank-you DaTario :smile:

Can you address why the one way the photon can go can be made to repeat every time the experiment is done? :confused:
 
Interference. It was made Constructive in one channel and Destructive in the other.
 

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