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Most Robust and Fragile States with the Same Entanglement Properties
Author(s) -
Li HongMei,
Zhao BaoKui
Publication year - 2018
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/andp.201800053
Subject(s) - quantum decoherence , quantum entanglement , dephasing , physics , quantum mechanics , qubit , robustness (evolution) , quantum information processing , cluster state , multipartite entanglement , quantum , statistical physics , squashed entanglement , biochemistry , gene , chemistry
Finding the most robust entangled states and the most fragile entangled states during the whole process of decoherence is particularly a fundamental problem for quantum physics and quantum information processing. Here the robustness of three‐qubit states under three different decoherence channels (amplitude damping, dephasing, bit flip) systematically are investigated, and the most robust genuine tripartite entangled states and the most fragile ones during each of the three decoherence processes are found. Moreover, the states with the most significant difference in robustness are shown to be locally unitarily equivalent to each other and therefore contain the same entanglement properties.