Quantum teleportation from a propagating photon to a solid-state spin qubit

W.B. Gao, P. Fallahi, E. Togan, A. Delteil, Y.S. Chin, J. Miguel-Sanchez and A. Imamoğlu ()
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W.B. Gao: Institute of Quantum Electronics, ETH Zurich
P. Fallahi: Institute of Quantum Electronics, ETH Zurich
E. Togan: Institute of Quantum Electronics, ETH Zurich
A. Delteil: Institute of Quantum Electronics, ETH Zurich
Y.S. Chin: Institute of Quantum Electronics, ETH Zurich
J. Miguel-Sanchez: Institute of Quantum Electronics, ETH Zurich
A. Imamoğlu: Institute of Quantum Electronics, ETH Zurich

Nature Communications, 2013, vol. 4, issue 1, 1-8

Abstract: Abstract A quantum interface between a propagating photon used to transmit quantum information and a long-lived qubit used for storage is of central interest in quantum information science. A method for implementing such an interface between dissimilar qubits is quantum teleportation. Here we experimentally demonstrate transfer of quantum information carried by a photon to a semiconductor spin using quantum teleportation. In our experiment, a single photon in a superposition state is generated using resonant excitation of a neutral dot. To teleport this photonic qubit, we generate an entangled spin–photon state in a second dot located 5 m away and interfere the photons from the two dots in a Hong-Ou-Mandel set-up. Thanks to an unprecedented degree of photon-indistinguishability, a coincidence detection at the output of the interferometer heralds successful teleportation, which we verify by measuring the resulting spin state after prolonging its coherence time by optical spin-echo.

Date: 2013
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DOI: 10.1038/ncomms3744

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