DocumentCode
3559059
Title
Parameter Estimation of Quantum Channels
Author
Ji, Zhengfeng ; Wang, Guoming ; Duan, Runyao ; Feng, Yuan ; Ying, Mingsheng
Author_Institution
State Key Lab. of Comput. Sci., Chinese Acad. of Sci., Beijing
Volume
54
Issue
11
fYear
2008
Firstpage
5172
Lastpage
5185
Abstract
The efficiency of parameter estimation of quantum channels is studied in this paper. We introduce the concept of programmable parameters to the theory of estimation. It is found that programmable parameters obey the standard quantum limit strictly; hence, no speedup is possible in its estimation. We also construct a class of nonunitary quantum channels whose parameter can be estimated in a way that the standard quantum limit is broken. The study of estimation of general quantum channels also enables an investigation of the effect of noises on quantum estimation.
Keywords
channel estimation; quantum communication; nonunitary quantum channels; parameter estimation; programmable parameters; Communication channels; Computer science; Estimation theory; Information theory; Intelligent systems; Laboratories; Maximum likelihood estimation; Parameter estimation; Quantum mechanics; Statistics; Heisenberg limit; parameter estimation; programmable gates; quantum channels; standard quantum limit;
fLanguage
English
Journal_Title
Information Theory, IEEE Transactions on
Publisher
ieee
ISSN
0018-9448
Type
jour
DOI
10.1109/TIT.2008.929940
Filename
4655455
Link To Document