Biphoton generation in quadratic waveguide arrays: A classical optical simulation

被引：40

作者：

Graefe, M. ^{[2
]}

Solntsev, A. S. ^{[1
]}

Keil, R. ^{[2
]}

Sukhorukov, A. A. ^{[1
]}

Heinrich, M. ^{[2
]}

Tuennermann, A. ^{[2
]}

Nolte, S. ^{[2
]}

Szameit, A. ^{[2
]}

Kivshar, Yu S. ^{[1
]}

机构：

[1] Australian Natl Univ, Res Sch Phys & Engn, Nonlinear Phys Ctr, Canberra, ACT 0200, Australia

[2] Univ Jena, Abbe Ctr Photon, Inst Appl Phys, D-07743 Jena, Germany

来源：

SCIENTIFIC REPORTS | 2012年 / 2卷

基金：

澳大利亚研究理事会;

关键词：

QUANTUM; WRITTEN;

D O I：

10.1038/srep00562

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Quantum entanglement became essential in understanding the non-locality of quantum mechanics. In optics, this non-locality can be demonstrated on impressively large length scales, as photons travel with the speed of light and interact only weakly with their environment. Spontaneous parametric down-conversion (SPDC) in nonlinear crystals provides an efficient source for entangled photon pairs, so-called biphotons. However, SPDC can also be implemented in nonlinear arrays of evanescently coupled waveguides which allows the generation and the investigation of correlated quantum walks of such biphotons in an integrated device. Here, we analytically and experimentally demonstrate that the biphoton degrees of freedom are entailed in an additional dimension, therefore the SPDC and the subsequent quantum random walk in one-dimensional arrays can be simulated through classical optical beam propagation in a two-dimensional photonic lattice. Thereby, the output intensity images directly represent the biphoton correlations and exhibit a clear violation of a Bell-like inequality.

引用

页数：5

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