Open AccessInterference effects induced by non-local spatial filtering
Author(s) -
S. P. Walborn,
P. H. Souto Ribeiro,
C. H. Monken
Publication year - 2011
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.017308
Subject(s) - optics , physics , photon , visibility , interference (communication) , spatial filter , quantum entanglement , spatial frequency , quantum imaging , gaussian , quantum , computer science , quantum mechanics , telecommunications , quantum network , channel (broadcasting)
The spatial correlation between down-converted photons allows for non-local spatial filtering when two-photon coincidences are registered. This allows one to non-locally control the visibility of interference fringes, to observe ghost images and interference patterns, and to "retrieve" a coherent quantum image from an incoherent field distribution. We show theoretically that non-local spatial filtering can lead to counter-intuitive effects when the pump beam is no longer given by a Gaussian profile. Namely, increased non-local filtering can actually decrease the visibility of interference fringes, contrary to what has been observed so far. We explain this behavior through the transverse spatial parity entanglement of the down-converted photons.