Study on Three Kinds of Measurements and Interrelations in Quantum Mechanics
Ce-Xiang Mei · Journal of Xianyang Normal University · 2008
This paper firstly introduces the concepts and their distinction between measurement,quantum mea-surement and classical measurement,and then analyzes the characteristic of the general measurement,orthogonal projective measurement and POVM,and finally simply gives applicable conditions and correlations of those three measurements.Making orthogonal measurement in a system can gain the general measurement in its subsystem,and making projective measurement in a subsystem,can gain a group of POVM.Making measurement in an isolat-ed system can get orthogonal projective measurement,while the general measurement is equivalent to the combi-nation of orthogonal projective measurement and unitary evolution.