Experimental Quantum Teleportation of a Two-Qubit Composite System

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dc.creatorZhang, Qiang
dc.creatorGoebel, Alexander
dc.creatorWagenknecht, Claudia
dc.creatorChen, Yu-Ao
dc.creatorZhao, Bo
dc.creatorYang, Tao
dc.creatorMair, Alois
dc.creatorSchmiedmayer, Joerg
dc.creatorPan, Jian-Wei
dc.date2006-09-18
dc.date.accessioned2026-07-07T08:09:39Z
dc.date.available2026-07-07T08:09:39Z
dc.descriptionQuantum 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 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 computation2-5, teleportation of a composite system containing two or more qubits has been seen as a long-standing goal in quantum information science. 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 such as multi-stage realization of quantum-relay, fault-tolerant quantum computation, universal quantum error-correction and one-way quantum computation.
dc.description16pages, 4 figures
dc.identifierhttps://arxiv.org/abs/quant-ph/0609129
dc.identifierhttp://arxiv.org/abs/quant-ph/0609129
dc.identifierNature Physics 2, 678 - 682 (2006)
dc.identifierdoi:10.1038/nphys417
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/131603
dc.subjectQuantum Physics
dc.titleExperimental Quantum Teleportation of a Two-Qubit Composite System
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