Can one tell me if the treatment of the Mach-Zehnder interferometer in

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SUMMARY

The discussion focuses on the treatment of the Mach-Zehnder interferometer, specifically addressing the interpretation of possible paths and their impact on detection clicks. The participant questions the correctness of the analysis presented in the attachment, highlighting a potential miscalculation that suggests an intensity of 25% for one of the paths (Y) when both paths (X and Y) should be considered. The conclusion emphasizes the need for a precise understanding of the interference patterns and the probabilities associated with each path in the interferometer setup.

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jk22
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Can one tell me if the treatment of the Mach-Zehnder interferometer in the attachment is correct ?
 

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My problem is : Since one could reason in terms of possible path : if 2 path are possible, only X clicks, else both X and Y, but this would lead to an intensity of 25% for Y.
 

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