[General] Can a single indivisible photon interfere?

[Roychoudhuri, Chandra]

Hello Everybody: Here is a potentially new “thread” for debate for our community.
“Can a single indivisible photon interfere?”
My answer is a strong “No”.

I just presented this paper at the OSA Annual meeting last week, held  at Washington, DC. It was well accepted by many.
It is only an 11-slide presentation. However, it experimentally demonstrates that, for Superposition Effect to emerge, we must have the simultaneous presence of two physical signals carrying two physically different phase information incident on the opposite sides of the beam-combiner of a two-beam Mach-Zehnder interferometer. The superposition effect emerges as purely a classical effect facilitated by the dielectric boundary of the beam combiner (classical light-matter interaction; no QM). The energies in the two superposed beams can have any value, no lower limit like “h-nu”. Thus, single photon interference is causally and physically an untenable logic, in my view point.

The experiment also underscores that the postulate of the “Wave-particle duality”, is completely unnecessary for EM waves. In fact, the Copenhagen Interpretation becomes more logical and causal without this postulate. The QM formulation is essentially correct. We do not need to degrade it by imposing non-causal postulates.
In the past, I have also proposed an experiment to validate that for “particle interference”, we also need pairs of out-of-phase particles to nullify the stimulation of the detector molecule to generate “dark fringes”.

Chandra.
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