Polarisation properties of single-mode biphotons
L. A. Krivitskiı̆, S. P. Kulik, Gleb Maslennikov, Maria V. Chekhova · Quantum Electronics · 2005
The paper reviews recent research by the authors on the polarisation properties of correlated photon pairs, also called biphotons, generated via spontaneous parametric down-conversion in the collinear frequency—degenerate regime. From the viewpoint of their polarisation properties, they represent qutrits, i.e., three-dimensional quantum systems, and are quite promising for quantum information applications.