According to Multiverse Q-FFF Theory, Single Slit interference is explained, if there is always an entangled anti copy wave (from our shadow Charge Parity (CP) Symmetric Universe : half of the Raspberry Multiverse) traveling through the same slit, and equipped with opposite wave structure.
Interference and diffraction is the result.
see also:
Bohmian Double Slit Interpretation by Dual Entangled Universes, and the Benjamin Libet experiment. http://vixra.org/pdf/1704.0047v1.pdf
see also:
Bohmian Double Slit Interpretation by Dual Entangled Universes, and the Benjamin Libet experiment. http://vixra.org/pdf/1704.0047v1.pdf
The Multiverse shadow wave is also responsible for all double slit single particle interference patterns. see below.
The raspberry Multiverse: