Detecting multipartite classical states and their resemblances

Detecting multipartite classical states and their resemblances. Chen, L., Chitambar, E., Modi, K., & Vacanti, G. Physical Review A - Atomic, Molecular, and Optical Physics, 83(2):1-4, 2011.

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We study various types of multipartite states lying near the quantum-classical boundary. The so-called classical states are precisely those in which each party can perfectly identify a locally held state without disturbing the global state, a task known as nondisruptive local state identification (NDLID). We show NDLID to be closely related local broadcasting, and we introduce a class of states called generalized classical states which allow for both NDLID and multipartite broadcasting when the most general quantum measurements are permitted. Simple analytical methods and a physical criterion are given for detecting whether a multipartite state is classical or generalized classical. For deciding the latter, a semidefinite programming algorithm is presented which may find use in other fields such as signal processing. © 2011 American Physical Society.

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 title = {Detecting multipartite classical states and their resemblances},
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 pages = {1-4},
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 abstract = {We study various types of multipartite states lying near the quantum-classical boundary. The so-called classical states are precisely those in which each party can perfectly identify a locally held state without disturbing the global state, a task known as nondisruptive local state identification (NDLID). We show NDLID to be closely related local broadcasting, and we introduce a class of states called generalized classical states which allow for both NDLID and multipartite broadcasting when the most general quantum measurements are permitted. Simple analytical methods and a physical criterion are given for detecting whether a multipartite state is classical or generalized classical. For deciding the latter, a semidefinite programming algorithm is presented which may find use in other fields such as signal processing. © 2011 American Physical Society.},
 bibtype = {article},
 author = {Chen, Lin and Chitambar, Eric and Modi, Kavan and Vacanti, Giovanni},
 doi = {10.1103/PhysRevA.83.020101},
 journal = {Physical Review A - Atomic, Molecular, and Optical Physics},
 number = {2}
}

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