Session U2: Quantum Cryptography and Quantum Communication I

8:00 AM–11:00 AM, Thursday, March 8, 2007
Colorado Convention Center Room: Four Seasons 4

Sponsoring Units: GQI DCMP
Chair: Paul Kwiat, University of Illinois at Urbana-Champaign

Abstract ID: BAPS.2007.MAR.U2.2

Abstract: U2.00002 : Beller Lectureship Recipient Talk: Applications of Quantum Teleportation

8:36 AM–9:12 AM

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  Jianwei Pan
    (Physikalisches Institut der Universitaet Heidelberg, Germany and Hefei National Laboratory for Physical Sciences at Microscale, China)

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. Very recently long-distance teleportation and open-destination teleportation have also been realized. Until now, previous experiments have only been able to teleport single qubits. However, since teleportation of single qubits is insufficient for a large-scale realization of quantum communication and computation, teleportation of a composite system containing two or more qubits has been seen as a long-standing goal in quantum information science. In my talk, I shall present the first 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. 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 such as multi-stage realization of quantum-relay, fault-tolerant quantum computation, universal quantum error-correction and one-way quantum computation.

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