Physics – Quantum Physics
Scientific paper
1998-06-29
Phys.Rev. A59 (1999) 141-155
Physics
Quantum Physics
27 pages, LaTex, 3 figures
Scientific paper
10.1103/PhysRevA.59.141
In the quest of completely describing entanglement in the general case of a finite number of parties sharing a physical system of finite dimensional Hilbert space a new entanglement magnitude is introduced for its pure and mixed states: robustness. It corresponds to the minimal amount of mixing with locally prepared states which washes out all entanglement. It quantifies in a sense the endurence of entanglement against noise and jamming. Its properties are studied comprehensively. Analytical expressions for the robustness are given for pure states of binary systems, and analytical bounds for mixed states of binary systems. Specific results are obtained mainly for the qubit-qubit system. As byproducts local pseudomixtures are generalized, a lower bound for the relative volume of separable states is deduced and arguments for considering convexity a necessary condition of any entanglement magnitude are put forward.
Tarrach Rolf
Vidal Guifre
No associations
LandOfFree
Robustness of entanglement does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Robustness of entanglement, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Robustness of entanglement will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-209667