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  1. 1 Li Y.

  2. 1 Song L.

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Entanglement conditions for four-mode states via the uncertainty relations in conjunction with partial transposition

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Song L., Wang X., Yan D., Li Y.
Open Physics
|
2008
|
vol. 6
|
issue 2
199-204
EN
From the Heisenberg uncertainty relation in conjunction with partial transposition, we derive a class of inequalities for detecting entanglements in four-mode states. The sufficient conditions for bipartite entangled states are presented. We also discuss the generalization of the entanglement conditions via the Schrödinger-Robertson indeterminacy relation, which are in general stronger than those based on the Heisenberg uncertainty relation.
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