Conditional teleportation of quantum-dot spin states

Haifeng Qiao, Yadav P. Kandel, Sreenath K. Manikandan, Andrew N. Jordan, Saeed Fallahi, Geoffrey C. Gardner, Michael J. Manfra and John M. Nichol ()
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Haifeng Qiao: University of Rochester
Yadav P. Kandel: University of Rochester
Sreenath K. Manikandan: University of Rochester
Andrew N. Jordan: University of Rochester
Saeed Fallahi: Purdue University
Geoffrey C. Gardner: Purdue University
Michael J. Manfra: Purdue University
John M. Nichol: University of Rochester

Nature Communications, 2020, vol. 11, issue 1, 1-9

Abstract: Abstract Among the different platforms for quantum information processing, individual electron spins in semiconductor quantum dots stand out for their long coherence times and potential for scalable fabrication. The past years have witnessed substantial progress in the capabilities of spin qubits. However, coupling between distant electron spins, which is required for quantum error correction, presents a challenge, and this goal remains the focus of intense research. Quantum teleportation is a canonical method to transmit qubit states, but it has not been implemented in quantum-dot spin qubits. Here, we present evidence for quantum teleportation of electron spin qubits in semiconductor quantum dots. Although we have not performed quantum state tomography to definitively assess the teleportation fidelity, our data are consistent with conditional teleportation of spin eigenstates, entanglement swapping, and gate teleportation. Such evidence for all-matter spin-state teleportation underscores the capabilities of exchange-coupled spin qubits for quantum-information transfer.

Date: 2020
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DOI: 10.1038/s41467-020-16745-0

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