Faculty of Science and Technology and MESA+ Institute for Nanotechnology, University of Twente, 7500 AE Enschede, The Netherlands.
Phys Rev Lett. 2010 Sep 3;105(10):107002. doi: 10.1103/PhysRevLett.105.107002. Epub 2010 Aug 31.
Perfect Cooper pair splitting is proposed, based on crossed Andreev reflection (CAR) in a p-type semiconductor-superconductor-n-type semiconductor (pSn) junction. The ideal splitting is caused by the energy filtering that is enforced by the band structure of the electrodes. The pSn junction is modeled by the Bogoliubov-de Gennes equations and an extension of the Blonder-Tinkham-Klapwijk theory beyond the Andreev approximation. Despite a large momentum mismatch, the CAR current is predicted to be large. The proposed straightforward experimental design and the 100% degree of pureness of the nonlocal current open the way to pSn structures as high quality sources of entanglement.
提出了一种基于 p 型半导体-超导- n 型半导体（pSn）结中交叉安德烈夫反射（CAR）的完美库珀对分裂方案。这种理想的分裂是由电极能带结构强制的能量过滤引起的。pSn 结通过 Bogoliubov-de Gennes 方程和 Blonder-Tinkham-Klapwijk 理论在安德烈夫近似之外的扩展来建模。尽管动量失配很大，但预测 CAR 电流会很大。所提出的直接实验设计和非局域电流的 100%纯度为 pSn 结构作为高质量纠缠源开辟了道路。
