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[en] We investigate the robustness of entanglement for a qubit-qudit system under depolarizing and dephasing channels. For depolarizing channel, we obtain a simple analytical expression of entanglement evolution. It is shown that the larger dimension d a qudit subsystem has, the more robust a pure state becomes. For dephasing channel, we find the most robust entangled states and the most fragile ones. Moreover, the robustness of these states is independent of the qudit’s dimension d. Graphical abstract: .
Journal
European Physical Journal. D, Atomic, Molecular and Optical Physics; ISSN 1434-6060; 
; v. 73(3); p. 1-5
; v. 73(3); p. 1-5