The double slit experiment with single photons does not require a coincidence counter to observe interference patterns. The discussion confirms that while coincidence counters are essential for entanglement experiments, they are unnecessary for determining the presence or absence of interference in single photon scenarios. This distinction is crucial for understanding the mechanics of quantum interference.
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Jamesc320010 said:I have what I believe is a simple question about the single photon (at a time) double slit experiment. This experiment does not use a coincidence counter correct? I understand that one, or more, is used for entanglement experiments, but is one necessary to determine an interference or lack of interference pattern?