Concurrence of mixed bipartite quantum states in arbitrary dimensions.
We derive a lower bound for the concurrence of mixed bipartite quantum states, valid in arbitrary dimensions. As a corollary, a weaker, purely algebraic estimate is found, which detects mixed entangled states with a positive partial transpose.
Mintert
Florian
F
Max-Planck-Institut für Physik Komplexer Systeme, Nöthnitzerstrasse 38, D-01187 Dresden, Germany.
Kuś
Marek
M
Buchleitner
Andreas
A