PT Journal
AU Zhang, Q
   Goebel, A
   Wagenknecht, C
   Chen, Y
   Zhao, B
   Yang, T
   Mair, A
   Schmiedmayer, J
   Pan, J
TI Experimental quantum teleportation of a two-qubit composite system
SO Nature Physics
JI Nat. Phys.
PY 2006
BP 678
EP 682
VL 2
IS 10
DE fromIPMRAS; quantum teleportation
AB Quantum teleportation, a way to transfer the state of a quantum system from one location to another, is central to quantum communication and plays an important role in a number of quantum computation protocols. Previous experimental demonstrations have been implemented with single photonic or ionic qubits. However, teleportation of single qubits is insufficient for a large-scale realization of quantum communication and computation. Here, we present the experimental realization of quantum teleportation of a two-qubit composite system. In the experiment, we develop and exploit a six-photon interferometer to teleport an arbitrary polarization state of two photons. The observed teleportation fidelities for different initial states are all well beyond the state estimation limit of 0.40 for a two-qubit system. Not only does our six-photon interferometer provide an important step towards teleportation of a complex system, it will also enable future experimental investigations on a number of fundamental quantum communication and computation protocols
ER