Physics – Quantum Physics
Scientific paper
2005-03-30
Physics
Quantum Physics
9 pages, 2 figures
Scientific paper
An experiment performed in 2002 by Sciarrino et al. provided a simple proof of the nonlocality of a single photon whose wave function is multi-branched. The difference between this experiment and others similar, is that the tester-particle used by Sciarrino to "feel" this nonlocality is another photon identical to the tested one. Such an experiment be can in principle performed with fermions too, and this is the case ivestigated in this article. The novel phenomenon revealed by Sciarrino's experiment, is the particle "borrowing". If a single particle is described by a two-branched wave function, then only one of these branches produces a detection at a time, the other ranch remains "silent". What happens in this experiment is that the silent branch "borrows" a particle from another source, if available in the neighborhood, and also produces a detection. To illustrate this feature more obviously, a modificaton of Sciarrino's experiment is proposed. Two sources of particles are made available in the neighborhood of the two branches. What then happens is that each branch takes and populates itself with a particle from whichever source is at hand.
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