Experimental perfect state transfer of an entangled photonic qubit

Robert J. Chapman, Matteo Santandrea, Zixin Huang, Giacomo Corrielli, Andrea Crespi, Man-Hong Yung, Roberto Osellame and Alberto Peruzzo ()
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Robert J. Chapman: Quantum Photonics Laboratory, School of Engineering, RMIT University
Matteo Santandrea: Istituto di Fotonica e Nanotecnologie, Consiglio Nazionale delle Ricerche
Zixin Huang: Quantum Photonics Laboratory, School of Engineering, RMIT University
Giacomo Corrielli: Istituto di Fotonica e Nanotecnologie, Consiglio Nazionale delle Ricerche
Andrea Crespi: Istituto di Fotonica e Nanotecnologie, Consiglio Nazionale delle Ricerche
Man-Hong Yung: South University of Science and Technology of China
Roberto Osellame: Istituto di Fotonica e Nanotecnologie, Consiglio Nazionale delle Ricerche
Alberto Peruzzo: Quantum Photonics Laboratory, School of Engineering, RMIT University

Nature Communications, 2016, vol. 7, issue 1, 1-7

Abstract: Abstract The transfer of data is a fundamental task in information systems. Microprocessors contain dedicated data buses that transmit bits across different locations and implement sophisticated routing protocols. Transferring quantum information with high fidelity is a challenging task, due to the intrinsic fragility of quantum states. Here we report on the implementation of the perfect state transfer protocol applied to a photonic qubit entangled with another qubit at a different location. On a single device we perform three routing procedures on entangled states, preserving the encoded quantum state with an average fidelity of 97.1%, measuring in the coincidence basis. Our protocol extends the regular perfect state transfer by maintaining quantum information encoded in the polarization state of the photonic qubit. Our results demonstrate the key principle of perfect state transfer, opening a route towards data transfer for quantum computing systems.

Date: 2016
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DOI: 10.1038/ncomms11339

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