Letter abstract
Nature Physics 2, 678 - 682 (2006)
doi:10.1038/nphys417
Subject Categories: Quantum physics | Information theory and computation | Optical physics
Experimental quantum teleportation of a two-qubit composite system
Qiang Zhang1,2, Alexander Goebel1, Claudia Wagenknecht1, Yu-Ao Chen1, Bo Zhao1, Tao Yang2, Alois Mair1, Jörg Schmiedmayer1,3 and Jian-Wei Pan1,2
Quantum teleportation1, a way to transfer the state of a quantum system from one location to another, is central to quantum communication2 and plays an important role in a number of quantum computation protocols3, 4, 5. Previous experimental demonstrations have been implemented with single photonic6, 7, 8, 9, 10, 11 or ionic qubits12, 13. However, teleportation of single qubits is insufficient for a large-scale realization of quantum communication and computation2, 3, 4, 5. 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 system14. 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 protocols3, 15, 16, 17, 18.
- Physikalisches Institut, Universität Heidelberg, Philosophenweg 12, D-69120 Heidelberg, Germany
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230027, People's Republic of China
- Atominstitut der Österreichischen Universitäten, TU-Wien, A-1020 Vienna, Austria
Correspondence to: Qiang Zhang1,2 e-mail: bowzhang@mail.ustc.edu.cn
Correspondence to: Jian-Wei Pan1,2 e-mail: jian-wei.pan@physi.uni-heidelberg.de
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