2007/03/20 by Sheng Feng, Chao-Hsiang Chen, Feng, Sheng +5
Engineering · Physics and Astronomy · #Laser-Matter Interactions and Applications #Nonlinear Optical Materials Studies #Orbital Angular Momentum in Optics #quant-ph
paper · pdf · doi:10.48550/arxiv.quant-ph/0703187
6 pages, 3 figures, references added
arxiv created 2007/03/21 · arxiv updated 2009/12/01
We study the two-photon detection amplitude of the down-converted beams in spontaneous parametric down-conversion when the physical variable of orbital angular momentum is involved, taking into account both conservation and non-conservation of angular momentum. Agreeing with experimental observations, our theoretical calculation shows that spatial structure of the two-photon detection amplitude of the down-converted beams carries important information about conservation or non-conservation of orbital angular momentum in spontaneous parametric down-conversion.