Quantum teleportation of a polarization state with a complete Bell state measurement

We report a quantum teleportation experiment in which nonlinear interaction s an used for the Bell state measurements. The experimental results demonst rate the working principle of irreversibly teleporting an unknown arbitrary polarization state from one system to another distant system by disassembl ing into and then later reconstructing from purely classical information an d nonclassical EPR correlations. The distinct feature of this experiment is that all four Bell states can be distinguished in the Bell state measureme nt. Teleportation of a polarization state can thus occur with certainty in principle.