2011年1月24日，我室量子物理与量子信息研究部杜江峰教授研究组与新加坡国立大学合作在PHYSICAL REVIEW LETTERS上发表题为Preservation of Bipartite Pseudoentanglement in Solids Using Dynamical Decoupling的论文。

Source: PHYSICAL REVIEW LETTERS Volume: 106 Issue: 4 Article Number: 040501 Published: JAN 24 2011

Wang Y (Wang, Ya)1,2, Rong X (Rong, Xing)1,2, Feng PB (Feng, Pengbo)1,2, Xu WJ (Xu, Wanjie)1,2, Chong B (Chong, Bo)1,2, Su JH (Su, Ji-Hu)1,2, Gong JB (Gong, Jiangbin)3,4, Du JF (Du, Jiangfeng)1,2
Addresses:
1. Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui Peoples R China
2. Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui Peoples R China
3. Natl Univ Singapore, Dept Phys, Singapore 117542, Singapore
4. Natl Univ Singapore, Ctr Computat Sci & Engn, Singapore 117542, Singapore
E-mail Addresses: djf@ustc.edu.cn

Reprint Address: Wang, Y (reprint author), Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui Peoples R China

Abstract:
A crucial challenge for future quantum technologies is to protect fragile entanglement against environment-induced decoherence. Here we demonstrate experimentally that dynamical decoupling can preserve bipartite pseudoentanglement in phosphorous donors in a silicon system. In particular, the lifetime of pseudoentangled states is extended from 0.4 mu s in the absence of decoherence control to 30 mu s in the presence of a two-flip dynamical decoupling sequence.