Experimental quantum teleportation of a two-qubit composite system

By Qiang Zhang, A. Goebel, C. Wagenknecht, Yu-Ao Chen, Bo Zhao, Tao Yang, A. Mair, Jörg Schmiedmayer, Jian-Wei Pan. 2006

194 citations recorded by the source corpus.

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.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/da8e048933b272d24a71223006302787f60f88cf

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Citations in the corpus

Heralded generation of entangled photon pairs (2010, background): “Current down-conversion experiments allow for the simultaneous generation of three photon pairs [21–24] with typical detection count rates, dependent on the experimental configuration, of about 10−3 to 10−1 Hz.”
Micius quantum experiments in space (2022, background): “Quantum teleportation has also been extended to the composite state of two photons (Zhang et al., 2006), multiple degrees of freedom (Wang et al., 2015), and higher dimensions of a single photon (Luo et al., 2019).”
Multiphoton entanglement and interferometry (2008, methodology): “Few-qubit cluster states of photons were created in several recent experiments (Zhang et al., 2006a; Walther et al., 2005b; Kiesel et al., 2005; Schmid et al., 2007; Lu et al., 2007).”