Universal finestructure eraser for quantum dots

作     者：Fognini, A. Ahmadi, A. Daley, S.J. Reimer, M.E. Zwiller, V. 

作者机构：Kavli Institute of Nanoscience Delft Delft University of Technology Delft2628 CJ Netherlands Institute for Quantum Computing and Department of Physics & Astronomy University of Waterloo WaterlooONN2L 3G1 Canada Institute for Quantum Computing Department of Electrical & Computer Engineering University of Waterloo WaterlooONN2L 3G1 Canada  AlbaNova University Center StockholmSE - 106 91 Sweden 

出 版 物：《arXiv》 (arXiv)

年 卷 期：2017年

核心收录：

主　　题：Semiconductor quantum dots 

摘      要：The measurable degree of entanglement from a quantum dot via the biexciton-exciton cascade depends crucially on the bright exciton fine-structure splitting and on the detection time resolution. Here, we propose an optical approach with fast rotating waveplates to erase this fine-structure splitting and therefore obtain a high degree of entanglement with near-unity efficiency. Our optical approach is possible with current technology and is also compatible with any quantum dot showing fine-structure splitting. Copyright © 2017, The Authors. All rights reserved.