%0 Journal Article
%T Re-Formulation of Mean KingĄ¯s Problem Using ShannonĄ¯s Entropy
%A Masakazu Yoshida
%A Hideki Imai
%J Journal of Quantum Information Science
%P 6-9
%@ 2162-576X
%D 2013
%I Scientific Research Publishing
%R 10.4236/jqis.2013.31002
%X <p>
	<span>Mean KingĄ¯s problem is formulated as a retrodiction problem among noncommutative observables. In this paper, we reformulate Mean KingĄ¯s problem using ShannonĄ¯s entropy as a first step of introducing quantum uncertainty relation with delayed classical information. As a result, we give informational and statistical meanings to the estimation on Mean King problem. As its application, we give an alternative proof of nonexistence of solutions of Mean KingĄ¯s problem for qubit system without using entanglement.</span><span></span> 
</p>
%K Mean KingĄ¯s Problem
%K Quantum Retrodiction Problem
%K Quantum Estimation Problem
%K ShannonĄ¯s Entropy
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=29283