parametric process quadratic waveguide array EPR state  

作　　者：杨莹 徐平 陆亮亮 祝世宁 

机构地区：National Laboratory of Solid State Microstructures and School of Physics, Nanjing University, Nanjing 210093, China

出　　处：《Communications in Theoretical Physics》2016年第2期219-224,共6页理论物理通讯（英文版）

基　　金：Supported by the State Key Program for Basic Research in China under Grant No.2012CB921802; the National Natural Science Foundations of China under Grant Nos.91321312,11321063 and 11422438

摘　　要：We propose the generation of photonic EPR state from quadratic waveguide array. Both the propagation constant and the nonlinearity in the array are designed to possess a periodical modulation along the propagation direction.This ensures that the photon pairs can be generated efficiently through the quasi-phase-matching spontaneous parametric down conversion by holding the spatial EPR entanglement in the fashion of correlated position and anticorrelated momentum. The Schmidt number which denotes the degree of EPR entanglement is calculated and it can approach a high value when the number of illuminated waveguide channels and the length of the waveguide array are properly chosen. These results suggest the quadratic waveguide array as a compact platform for engineering photonic quantum states in a high-dimensional Hilbert space.

关 键 词：Photonic EPR State from Quadratic Waveguide Array with Alternating Positive and Negative Couplings 

分 类 号：TN252[电子电信—物理电子学]