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Concurrence, tangle and fully entangled fraction |
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| Authors: | Li Ming Fei Shao-Ming and Li-Jost Xianqing |
| Abstract: | We show that although we cannot distil a singlet from many pairs of bound entangled states, the concurrence and the tangle of two entangled quantum states are always strictly larger than those of one of them, 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. |
| Keywords: | concurrence entanglement teleportation |
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