Necessary and Sufficient Conditions for the Trumping Relation

Details Necessary and Sufficient Conditions for the Trumping Relation Necessary and Sufficient Conditions for the Trumping Relation

2007-07-03

arxiv.org/abs/0707.0444v1

J. Phys. A: Math. Theor. 40 (2007) 12185-12212

Physics

Quantum Physics

9 pages; comments appreciated; (this article is a corrected and modified version, which combines this preprint with arXiv:0706

Scientific paper

10.1088/1751-8113/40/40/012

Entanglement catalysis allows one to convert certain entangled states into others by the temporary involvement of another entangled state (so-called catalyst), where after the conversion the catalyst is returned to the same state. For bipartite pure entangled states that can be transformed in this way with unit probability, the respective Schmidt coefficients are said to satisfy the trumping relation, a mathematical relation which is an extension of the majorization relation. This article provides all necessary and sufficient conditions for the trumping relation in terms of the Schmidt coefficients. The coefficients should satisfy strict inequalities for the entropy of entanglement and for power means excluding the special power 1.

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