Entanglement-annihilating and entanglement-breaking channels - Quantum PhysicsReport as inadecuate

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Abstract: We introduce and investigate a family of entanglement-annihilating channels.These channels are capable of destroying any quantum entanglement within thesystem they act on. We show that they are not necessarily entanglementbreaking. In order to achieve this result we analyze the subset of locallyentanglement-annihilating channels. In this case, the same local noise appliedon each subsystem individually is less entanglement annihilating with respectto multi-partite entanglement as the number of subsystems is increasing.Therefore, the bipartite case provides restrictions on the set of localentanglement-annihilating channels for the multipartite case. The introducedconcepts are illustrated on the family of single-qubit depolarizing channels.

Author: Lenka Moravčíková, Mario Ziman

Source: https://arxiv.org/


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