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- Title
Robustness of Λ-entanglement of multipartite states.
- Authors
Yang, Ying; Cao, Huai-Xin; Meng, Hui-Xian
- Abstract
By introducing the relative robustness of Λ -entanglement of a multipartite state related to a Λ -separable state, the robustness of Λ -entanglement of a multipartite state is defined as the minimum of the relative robustness of Λ -entanglement of a state related to all Λ -separable states. It is proved that, as a function on the set of all quantum states of an n-partite system, robustness of Λ -entanglement is nonnegative, lower semi-continuous, and convex, and it is zero if and only if the state is Λ -separable. Thus, robustness of Λ -entanglement not only quantifies the endurance of Λ -entanglement of a state against linear noise, but also can be used to distinguish Λ -separable states from Λ -entangled states. Furthermore, influences of a quantum channel on robustness of Λ -entanglement are discussed.
- Subjects
SET functions
- Publication
Quantum Information Processing, 2019, Vol 18, Issue 12, pN.PAG
- ISSN
1570-0755
- Publication type
Article
- DOI
10.1007/s11128-019-2473-5