Three types of maximally entangled states for a two-particle system



For a two-particle (spin 1/2) system, three fundamental forms of complete sets of commuting observables (CSCO) composed of two-body operatorsσ 1α σ 2α are given. The corresponding simultaneous eigenstates constitute three types of maximally entangled states, one of which is the well known Bell basis. This paper discusses the possible pairs of spin observables whose simultaneous measurement outcomes are definitely correlated in probabilistic fashion.


spin entangled state complete set of commuting observables two-body operator 


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Copyright information

© Science in China Press 2004

Authors and Affiliations

  1. 1.Department of PhysicsTsinghua UniversityBeijingChina
  2. 2.Department of PhysicsPeking UniversityBeijingChina

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