B Particle properties conclusion from no-slit diffraction

[roineust]

Is it possible to infer particle properties from 2 sources diffraction with no slit/slits involved?

Some explanations of experiments i can find, if i understand them correctly at all, relate to the possibility of concluding particle momentum, from absorption lines, when emanating from a single source, passing though a slit or slits. But is it possible to infer particle properties such as momentum, from diffraction patterns emanating from 2 sources, with no slit or slits which the particle/wave passes though?

Am i making any sense with this question or have i just made a huge mess of quantum mechanics basics?

 

[Charles Link]

In general, I don't think you can do much with just two photons, at least not much more than you can with a single photon.
It may be of interest to look at two r-f (radio frequency) (antenna) sources: Yes, they do make an interference pattern and there are no slits involved.

 

[roineust]

But can any particle properties be inferred from no-slit interference pattern, the same way that, if i understand correctly, particle properties are inferred from slit experiments absorption lines and granularity?

 

[Charles Link]

I forgot to mention that the two r-f sources need to be in phase or have a constant relative phase. Otherwise, you do not get a well-ordered interference pattern. Two individual photons will not give a regular interference pattern.
They have actually done experiments with single photons using a beamsplitter and mirrors=Michelson interferometer. If I remember correctly, the result was a single photon can produce an interference pattern, i.e. If there are numerous single photon events, you do get an interference pattern.