MiS Preprint Repository

Delve into the future of research at MiS with our preprint repository. Our scientists are making groundbreaking discoveries and sharing their latest findings before they are published. Explore repository to stay up-to-date on the newest developments and breakthroughs.

MiS Preprint

Concurrence, Tangle and Fully Entangled Fraction of Quantum Entanglement

Ming Li, Shao-Ming Fei, Xianqing Li-Jost and Zhi-Xi Wang


We show that although we can not distill a singlet from many pairs of bound entangled states, the concurrence and tangle of two entangled quantum states are always strictly larger than that of one, even both entangled quantum states are bound entangled. We present a relation between the concurrence and the fidelity of optimal teleportation. We also give new upper and lower bounds for concurrence and tangle.

Aug 17, 2009
Aug 18, 2009
03.67.-a, 02.20.Hj, 03.65.-w