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Title: Detecting multipartite classical states and their resemblances
Authors: Chen, L. 
Chitambar, E.
Modi, K. 
Vacanti, G.
Issue Date: 15-Feb-2011
Citation: Chen, L., Chitambar, E., Modi, K., Vacanti, G. (2011-02-15). Detecting multipartite classical states and their resemblances. Physical Review A - Atomic, Molecular, and Optical Physics 83 (2) : -. ScholarBank@NUS Repository.
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.
Source Title: Physical Review A - Atomic, Molecular, and Optical Physics
ISSN: 10502947
DOI: 10.1103/PhysRevA.83.020101
Appears in Collections:Staff Publications

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