Teleportation of an Unknown Quantum State via Partly Entangled States

摘要

The teleportation of an unknown quantum state from one observer to another is of great importance in quantum information. In the standard teleportation scheme, a maximally entangled state is demanded. However, it is itficult to prepare such states in practice, and real entangled states are always partly entangled. We present ascheme to teleport an unknown quantum state using two partly entangled states. We show that the teleportationcan be realized with a certain probability.