Enhancing parameter precision of optimal quantum estimation by quantum screening |
| |
| Affiliation: | 1. Physical and Photoelectric Science Department, Guangdong Ocean University, Zhanjiang 524088, China;2. Department of Electronic and Communication Engineering, Changsha University, Changsha 410003, China |
| |
| Abstract: | We propose a scheme of quantum screening to enhance the parameter-estimation precision in open quantum systems by means of the dynamics of quantum Fisher information.The principle of quantum screening is based on an auxiliary system to inhibit the decoherence processes and erase the excited state to the ground state.By comparing the case without quantum screening,the results show that the dynamics of quantum Fisher information with quantum screening has a larger value during the evolution processes. |
| |
| Keywords: | quantum Fisher information quantum screening parameter estimation |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《中国物理 B》浏览原始摘要信息 |
|
点击此处可从《中国物理 B》下载免费的PDF全文 |
|
