Is there an interference pattern within a non-interference pattern?

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SUMMARY

This discussion explores the concept of interference patterns in quantum mechanics, specifically regarding single photons passing through slits. In Scenario 1, where a single slit is used, the result is a column of dots with no hidden interference pattern. In Scenario 2, with a double slit and measurement of which slit the photon passes through, the outcome is two distinct columns of dots, with debate surrounding the presence of hidden interference patterns within each column. The conclusion emphasizes that interpretations of quantum mechanics influence the understanding of these phenomena.

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  • Understanding of quantum mechanics principles
  • Familiarity with the double-slit experiment
  • Knowledge of photon behavior in wave-particle duality
  • Basic concepts of quantum measurement theory
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  • Study the interpretations of quantum mechanics, such as Copenhagen and Many-Worlds
  • Examine experimental setups for single photon interference
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Physicists, quantum mechanics students, and researchers interested in the nuances of photon behavior and interference patterns in quantum experiments.

San K
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Consider two scenarios:

Scenario 1:

Single slit, single photons sent one by one.

We would have a blob or column of dots. However inside this column is there an interference pattern hidden?

Scenario 2:

Double slit, single photons sent one by one, however we have instrumentation in place to find out which slit the photon went through.

In this case there would be two columns of dots. However inside (each of) these two columns is there an interference pattern hidden?

In summary:

Could a single photon via a single slit still be interfering with "itself"?
 
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San K said:
Consider two scenarios:

Scenario 1:

Single slit, single photons sent one by one.

We would have a blob or column of dots. However inside this column is there an interference pattern hidden?
No.

San K said:
Scenario 2:

Double slit, single photons sent one by one, however we have instrumentation in place to find out which slit the photon went through.

In this case there would be two columns of dots. However inside (each of) these two columns is there an interference pattern hidden?

Some say yes - some say no. Depends on interpretation.
 

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