Has this experiment been done?

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The discussion centers on the exploration of an experiment involving the creation of two pairs of entangled photons, where one photon from each pair undergoes either a Bell-state measurement or a separable state measurement. The key requirement is that the choice of measurement type is made randomly, affecting the entanglement status of the remaining photons. This experiment contrasts with existing studies, such as the one published in Nature Physics (2012), which does not incorporate random measurement decisions. The concept of separable state measurement is clarified as a process where entanglement swapping does not occur.

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StevieTNZ
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Hi there,

I'm looking for an experiment performed to date that:
(a) creates two pairs of entangled photons (in the same entangled state);
(b) subjects one photon of each pair to a bell-state measurement or decides to perform a separable state measurement on the two photons (so they don't become entangled)
(c) that (b) is randomly decided
(d) the two photons left are then measured (which indicate they're entangled; if not, they remain entangled as when they're produced).

Basically an experiment opposite of http://www.nature.com/nphys/journal/v8/n6/full/nphys2294.html, except both separable and bell-state measurements are performed on the two photons going to Victor (and that is randomly decided).
 
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What is a separable state measurement?
 
Khashishi said:
What is a separable state measurement?

One in which entanglement swapping does not occur on the two photons that go to a particular party.
 

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