TY - JOUR
T1 - Quantum walks of correlated photon pairs in two-dimensional waveguide arrays
AU - Poulios, Konstantinos
AU - Keil, Robert
AU - Fry, Daniel
AU - Meinecke, Jasmin D.A.
AU - Matthews, Jonathan C.F.
AU - Politi, Alberto
AU - Lobino, Mirko
AU - Gräfe, Markus
AU - Heinrich, Matthias
AU - Nolte, Stefan
AU - Szameit, Alexander
AU - O'Brien, Jeremy L.
PY - 2014/4/10
Y1 - 2014/4/10
N2 - We demonstrate quantum walks of correlated photons in a two-dimensional network of directly laser written waveguides coupled in a "swiss cross" arrangement. The correlated detection events show high-visibility quantum interference and unique composite behavior: strong correlation and independence of the quantum walkers, between and within the planes of the cross. Violations of a classically defined inequality, for photons injected in the same plane and in orthogonal planes, reveal nonclassical behavior in a nonplanar structure.
AB - We demonstrate quantum walks of correlated photons in a two-dimensional network of directly laser written waveguides coupled in a "swiss cross" arrangement. The correlated detection events show high-visibility quantum interference and unique composite behavior: strong correlation and independence of the quantum walkers, between and within the planes of the cross. Violations of a classically defined inequality, for photons injected in the same plane and in orthogonal planes, reveal nonclassical behavior in a nonplanar structure.
UR - http://www.scopus.com/inward/record.url?scp=84898472280&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.112.143604
DO - 10.1103/PhysRevLett.112.143604
M3 - Article
AN - SCOPUS:84898472280
VL - 112
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 14
M1 - 143604
ER -