I would like to put to the critic of the RG participants a hypothesis about the nature of the wave function (WF) - more specifically about WF collapse.
According to it: the particle is a real entity and creates a real wave, which has real nature and is described by the WF. This wave can interract with the particle by changing its trajectory as is evident from double slit and Mach Zehnder interferometer. So far it looks like de Broglie interpretation.
But the WF collapse is explained as impossibility of the wave to interact with the particle after the particle is affected in the process of measurement. After measurement the particle creates a new wave and can interact only with it. Maybe as a prove can be regarded the fact that when the measurement is weak there is partlial visibility of the interference.
Then there are two possibilities about the wave. First - It can not interact with other particles following Diracs sentence that “An electron interferes only with itself”.Then this wave is no more observable. Or can get observable after removing all consequences from the measurent (erasing the measurement). There can maybe offered an experiment (I didn’t thought about).
Second the wave can interfere with another particle provided it is in a state the original particle was in before the measurement. Indication of this are some papers of interference of two lasers and Hong-Mandel-Ou intereference. If this is the case I propose an experiment which may solve the case. The plot is the following file.
WF hipothesis plot.doc
There scheme is checked for D2 and D1 events and t2