Channel capacities versus entanglement measures in multiparty quantum states

Sen(De), Aditi ; Sen, Ujjwal (2010) Channel capacities versus entanglement measures in multiparty quantum states Physical Review A, 81 (1).

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Official URL: https://doi.org/10.1103%2Fphysreva.81.012308

Abstract

For quantum states of two subsystems, entanglement measures are related to capacities of communication tasks -- highly entangled states give higher capacity of transmitting classical as well as quantum information. However, we show that this is no more the case in general: quantum capacities of multi-access channels, motivated by communication in quantum networks, do not have any relation with genuine multiparty entanglement measures. Along with revealing the structural richness of multi-access channel capacities, this gives us a tool to classify multiparty quantum states from the perspective of its usefulness in quantum networks, which cannot be visualized by known multiparty entanglement measures.

Item Type:Article
Source:Copyright of this article belongs to American Physical Society (APS)
ID Code:125856
Deposited On:12 Oct 2022 11:44
Last Modified:12 Oct 2022 11:44

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