Quantum Information Processing

, Volume 10, Issue 5, pp 697–704 | Cite as

Catalysis of entanglement transformation for 2 × 2-dimensional mixed states



At first, the ability of pure states as an entanglement catalysts for transformation between 2 × 2-dimensional mixed states is discussed. Necessary and sufficient conditions for the transformation between 2 × 2-dimensional rank 2 mixed states by entanglement-assisted LOCC operations (ELOCC) are then presented. In addition, the method to construct an entanglement catalyst for transformation between 2 × 2-dimensional rank 2 mixed states is illustrated by an example.


Transformation Entanglement catalysis Mixed state 


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© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  1. 1.School of Mathematics, Physics and Information ScienceZhejiang Ocean UniversityZhoushanChina
  2. 2.College of AutomationNorthwestern Polytechnical UniversityXi’anChina

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