Dear Vladimir Tamari,
As the wave mechanics described in Coherently-cyclic cluster-matter paradigm of universe differs, the phenomena of diffraction and interference are also expressional differently.
In this paradigm, the 'source' is a group of string-segments in holarchy, with different eigen-rotational frequencies that contributes a wave spectrum observational by a tetrahedral-brane of eigen-rotational string. As time emerges with dimensionality, the state of 'now' is expressional with the eigen-rotations of string-segments and in this paradigm, the space-time is discrete rather than continuum, instead the matters are string continuum. Gravity emerges with space and time as a tensor on eigen-rotations of string-segments and not warps space and time.
Thus, fundamental matters are string like structures rather than point like particles and an eigen-rotational string-segment itself is expressional as a quantum of tetrahedral brane, as the quantization of point like photons is not dimensional with wave function collapse.
With best wishes
Jayakar